[clang] [clang-tools-extra] [test] A few tests fail in debug and need to be marked UNSUPPORTED (PR #208548)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman requested changes to this pull request.

Requesting changes just so we don't accidentally land this on another accept while there's outstanding questions.

https://github.com/llvm/llvm-project/pull/208548