[llvm] [llvm-lit] Add precommit test to verify current behavior of glob expansion in lit's internal shell (PR #106325)

[Alexander Richardson via llvm-commits]

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+## Tests glob pattern expansion by listing matching files.
+# RUN: echo %{inputs}/shtest-glob/example_file*.txt
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arichardson wrote:

Thanks, this is good. Can we also try testing a glob expansion passes to a non-builtin command? E.g. a local python script?

https://github.com/llvm/llvm-project/pull/106325