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

[Ian Anderson via cfe-commits]

ian-twilightcoder wrote:

> > A few clang tests stack overflow with a debug clang. Copy the debug lit feature from LLVM and mark the crashing tests unsupported in debug.
> 
> When did this behavior start? I'm worried this is papering over real issues if these failures are a recent thing. I'm particularly worried about the codegen test for deducing this -- I don't see what in that test should cause problematic amounts of overhead.
> 
> FWIW, I exclusively use debug builds of Clang and I do not see any of these failures (but I routinely see one on template instantiation depths).

I don't know when this started, it's infrequent that I run `check-all`. It might also make a difference that I'm running these on macOS, so I could add that qualifier to some/all of these if that would be more appropriate.

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