[MLGO] Remove python-38 flag from tests

[boomanaiden154]

Previously, we had a python-38 flag for the mlgo-utils tests as they needed a python version higher than what LLVM required by default due to type annotations. Now that LLVM's default Python version minimum is 3.8, we can remove this flag.

[llvm-ci]

LLVM Buildbot has detected a new failure on builder lldb-aarch64-windows running on linaro-armv8-windows-msvc-05 while building llvm at step 6 "test".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/141/builds/360

Here is the relevant piece of the build log for the reference:

Step 6 (test) failure: build (failure)
...
28.978 [1/6/283] Linking CXX executable tools\lldb\unittests\UnwindAssembly\ARM64\Arm64InstEmulationTests.exe
29.138 [1/5/284] Linking CXX executable tools\lldb\unittests\UnwindAssembly\PPC64\PPC64InstEmulationTests.exe
llvm-lit.py: C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\llvm\utils\lit\lit\llvm\config.py:57: note: using lit tools: C:\Users\tcwg\scoop\apps\git\2.39.0.windows.2\usr\bin
llvm-lit.py: C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\llvm\utils\lit\lit\llvm\config.py:508: note: using clang: c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe
llvm-lit.py: C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\llvm\utils\lit\lit\llvm\config.py:508: note: using ld.lld: c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\ld.lld.exe
llvm-lit.py: C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\llvm\utils\lit\lit\llvm\config.py:508: note: using lld-link: c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\lld-link.exe
llvm-lit.py: C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\llvm\utils\lit\lit\llvm\config.py:508: note: using ld64.lld: c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\ld64.lld.exe
llvm-lit.py: C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\llvm\utils\lit\lit\llvm\config.py:508: note: using wasm-ld: c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\wasm-ld.exe
29.340 [1/4-- Testing: 1977 tests, 2 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 
FAIL: lldb-shell :: SymbolFile/DWARF/x86/dwp-foreign-type-units.cpp (1610 of 1977)
******************** TEST 'lldb-shell :: SymbolFile/DWARF/x86/dwp-foreign-type-units.cpp' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 19
c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe --target=specify-a-target-or-use-a-_host-substitution -target x86_64-pc-linux -gdwarf-5 -gsplit-dwarf    -fdebug-types-section -gpubnames -c C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\Shell\SymbolFile\DWARF\x86\dwp-foreign-type-units.cpp -o C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.main.o
# executed command: 'c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe' --target=specify-a-target-or-use-a-_host-substitution -target x86_64-pc-linux -gdwarf-5 -gsplit-dwarf -fdebug-types-section -gpubnames -c 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\Shell\SymbolFile\DWARF\x86\dwp-foreign-type-units.cpp' -o 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.main.o'
# note: command had no output on stdout or stderr
# RUN: at line 21
c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe --target=specify-a-target-or-use-a-_host-substitution -target x86_64-pc-linux -gdwarf-5 -gsplit-dwarf -DVARIANT    -fdebug-types-section -gpubnames -c C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\Shell\SymbolFile\DWARF\x86\dwp-foreign-type-units.cpp -o C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.foo.o
# executed command: 'c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\clang.exe' --target=specify-a-target-or-use-a-_host-substitution -target x86_64-pc-linux -gdwarf-5 -gsplit-dwarf -DVARIANT -fdebug-types-section -gpubnames -c 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\Shell\SymbolFile\DWARF\x86\dwp-foreign-type-units.cpp' -o 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.foo.o'
# note: command had no output on stdout or stderr
# RUN: at line 23
c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\ld.lld.exe C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.main.o C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.foo.o -o C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp
# executed command: 'c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\ld.lld.exe' 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.main.o' 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.foo.o' -o 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp'
# .---command stderr------------
# | ld.lld: warning: cannot find entry symbol _start; not setting start address
# `-----------------------------
# RUN: at line 26
rm -f C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.dwp
# executed command: rm -f 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp.dwp'
# note: command had no output on stdout or stderr
# RUN: at line 27
c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\lldb.exe --no-lldbinit -S C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/tools/lldb\test\Shell\lit-lldb-init-quiet    -o "type lookup IntegerType"    -o "type lookup FloatType"    -o "type lookup CustomType"    -b C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp | c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\filecheck.exe C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\Shell\SymbolFile\DWARF\x86\dwp-foreign-type-units.cpp --check-prefix=NODWP
# executed command: 'c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\lldb.exe' --no-lldbinit -S 'C:/Users/tcwg/llvm-worker/lldb-aarch64-windows/build/tools/lldb\test\Shell\lit-lldb-init-quiet' -o 'type lookup IntegerType' -o 'type lookup FloatType' -o 'type lookup CustomType' -b 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\build\tools\lldb\test\Shell\SymbolFile\DWARF\x86\Output\dwp-foreign-type-units.cpp.tmp'
# note: command had no output on stdout or stderr
# executed command: 'c:\users\tcwg\llvm-worker\lldb-aarch64-windows\build\bin\filecheck.exe' 'C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\Shell\SymbolFile\DWARF\x86\dwp-foreign-type-units.cpp' --check-prefix=NODWP
# .---command stderr------------
# | C:\Users\tcwg\llvm-worker\lldb-aarch64-windows\llvm-project\lldb\test\Shell\SymbolFile\DWARF\x86\dwp-foreign-type-units.cpp:34:16: error: NODWP-NEXT: is not on the line after the previous match
# | // NODWP-NEXT: unsigned int
# |                ^
# | <stdin>:14:10: note: 'next' match was here
# |  typedef unsigned int IntegerType;
# |          ^
# | <stdin>:7:13: note: previous match ended here
# | unsigned int
# |             ^