[llvm] [Dexter] Extend XFAIL of Dexter tests to all MacOS architectures. (PR #83936)

[via llvm-commits]

dyung wrote:

> We run the debug info tests on GreenDragon on an Intel machine, so if they're not currently XFAIL'd they should be passing there (I'd double check but green.lab.llvm.org is having trouble currently). That said, if they're already disabled on arm I don't mind extending this to x86.

If they are passing, I would be curious what your configuration is, or if there is something I'm not setting up correctly. My setup is a just a clean OS install with XCode and some homebrew stuff installed so should have very little extra stuff, but there could be a configuration setting I might be missing?

https://github.com/llvm/llvm-project/pull/83936