[clang] [lld] [llvm] [mlir] [LLVM][Windows] Elide `PrettyStackTrace` output for usage errors (PR #140956)

[Matt Arsenault via cfe-commits]

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@@ -1,15 +1,26 @@
-; REQUIRES: x86, non-root-user
-;; Not supported on windows since we use permissions to deny the creation
-; UNSUPPORTED: system-windows
+;; The output is OS-specific, so this test is limited to Windows.
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arsenm wrote:

This new failure condition should probably be a separate test and not a change to the old one

https://github.com/llvm/llvm-project/pull/140956