Revert "Cherrypick commits to synchronize the debugger output and error stream"

[DougGregor]

Reverts #10368

[DougGregor]

@swift-ci please test

[DougGregor]

Note: the pull request broke Windows CI:

FAILED: tools/lldb/source/Plugins/ScriptInterpreter/Python/CMakeFiles/lldbPluginScriptInterpreterPython.dir/ScriptInterpreterPython.cpp.obj 
C:\PROGRA~1\MICROS~2\2022\COMMUN~1\VC\Tools\MSVC\1442~1.344\bin\Hostx64\x64\cl.exe  /nologo /TP -DGTEST_HAS_RTTI=0 -DLIBXML_STATIC -DLLDB_ENABLE_SWIFT -DLLDB_PYTHON_EXE_RELATIVE_PATH=\"python.exe\" -DLLDB_PYTHON_RELATIVE_LIBDIR=\"lib/site-packages\" -DSWIFT_BUILD_REGEX_PARSER_IN_COMPILER -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_ENABLE_EXTENDED_ALIGNED_STORAGE -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IT:\5\tools\lldb\source\Plugins\ScriptInterpreter\Python -IC:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\llvm-project\lldb\source\Plugins\ScriptInterpreter\Python -IC:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\llvm-project\lldb\include -IT:\5\tools\lldb\include -IT:\5\include -IC:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\llvm-project\llvm\include -IT:\PythonAMD64-3.9.10\tools\include -IC:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\llvm-project\llvm\..\clang\include -IT:\5\tools\lldb\..\clang\include -IC:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\swift\include -IC:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\swift\stdlib\public\SwiftShims -IT:\5\tools\lldb\..\swift\include -IC:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\llvm-project\lldb\source -IT:\5\tools\lldb\source -external:IT:\Library\libxml2-2.11.5\usr\include\libxml2 -external:W0 /GS- /Gw /Gy /Oi /Oy /Zc:inline /Zc:__cplusplus /Zc:inline /Zc:preprocessor /Zc:__cplusplus /Oi /bigobj /permissive- /W4 -wd4141 -wd4146 -wd4244 -wd4267 -wd4291 -wd4351 -wd4456 -wd4457 -wd4458 -wd4459 -wd4503 -wd4624 -wd4722 -wd4100 -wd4127 -wd4512 -wd4505 -wd4610 -wd4510 -wd4702 -wd4245 -wd4706 -wd4310 -wd4701 -wd4703 -wd4389 -wd4611 -wd4805 -wd4204 -wd4577 -wd4091 -wd4592 -wd4319 -wd4709 -wd5105 -wd4324 -w14062 -we4238 /Gw /O2 /Ob2  -std:c++17 -MD   -wd4018 -wd4068 -wd4150 -wd4201 -wd4251 -wd4521 -wd4530 -wd4589  /EHs-c- /GR- -UNDEBUG /showIncludes /Fotools\lldb\source\Plugins\ScriptInterpreter\Python\CMakeFiles\lldbPluginScriptInterpreterPython.dir\ScriptInterpreterPython.cpp.obj /Fdtools\lldb\source\Plugins\ScriptInterpreter\Python\CMakeFiles\lldbPluginScriptInterpreterPython.dir\lldbPluginScriptInterpreterPython.pdb /FS -c C:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\llvm-project\lldb\source\Plugins\ScriptInterpreter\Python\ScriptInterpreterPython.cpp
T:\PythonAMD64-3.9.10\tools\include\pyconfig.h(190): error C2371: 'pid_t': redefinition; different basic types
C:\Users\swift-ci\jenkins\workspace\swift-syntax-PR-windows\llvm-project\lldb\include\lldb/Host/windows/PosixApi.h(80): note: see declaration of 'pid_t'