[clang] [llvm] Invalidate tests using "touch -a" on Darwin (PR #192521)

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zalsaigh wrote:

Hello!
Sorry, new here. Why is it preferable to have that comment to `LIT_XFAIL` deep in test code where someone new to the repo may not be able to discern it (at least not without AI help) instead of just invalidate/skip the test as this PR would have appeared to do? Does this issue not have a 100% repro rate on Darwin architecture? I'm running into the same failure and I don't have Crowdstrike on my machine (or at least I assume I don't, followed https://www.help.brown.edu/wiki/spaces/kb/pages/4446847031/How+to+Confirm+that+your+CrowdStrike+installation+was+successful#Launching-the-Application and nothing shows up)

https://github.com/llvm/llvm-project/pull/192521