[llvm-lit] Add precommit test to verify current behavior of glob expansion in lit's internal shell

llvm/utils/lit/tests/Inputs/shtest-glob/example_file1.input

@@ -0,0 +1,2 @@
+## This is the first example file used for testing glob pattern matching.
+This is the first example file.

llvm/utils/lit/tests/Inputs/shtest-glob/example_file2.input

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+## This is the second example file used for testing glob pattern matching.
+This is the second example file.

llvm/utils/lit/tests/Inputs/shtest-glob/glob-echo.txt

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+## Tests glob pattern expansion by listing matching files.
+# RUN: echo %S/example_file*.input

llvm/utils/lit/tests/Inputs/shtest-glob/glob-mkdir.txt

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+## Tests glob pattern handling in the mkdir command.
+# RUN: not mkdir %S/example_file*.input

llvm/utils/lit/tests/Inputs/shtest-glob/lit.cfg

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+import lit.formats
+
+config.name = "shtest-glob"
+config.suffixes = [".txt"]
+config.test_format = lit.formats.ShTest()
+config.test_source_root = None
+config.test_exec_root = None
+config.substitutions.append(("%{python}", '"%s"' % (sys.executable)))

llvm/utils/lit/tests/shtest-glob.py

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+## Tests glob pattern handling in echo command.
+
+# RUN: not %{lit} -a -v %{inputs}/shtest-glob \
+# RUN: | FileCheck -dump-input=fail -match-full-lines %s
+#
+# END.
+
+# CHECK: UNRESOLVED: shtest-glob :: glob-echo.txt ({{[^)]*}})
+# CHECK: TypeError: string argument expected, got 'GlobItem'
+
+# CHECK: FAIL: shtest-glob :: glob-mkdir.txt ({{[^)]*}}
+# CHECK: # error: command failed with exit status: 1