[lld] [llvm] [ld64.lld, llvm-otool] Minimal arm64e.x1 support (PR #222721)

[Carlo Cabrera via llvm-commits]

carlocab wrote:

For the record, given that

- reverts are cheap
- post-commit review is an established part of the LLVM development process
- the appearance of `arm64e.x1` in the macOS 27 SDK was breaking multiple downstream users

I think that @nico made the right move to merge this without waiting for another round of pre-commit review.

I'm also happy to help fix any other breakage that results from here.

https://github.com/llvm/llvm-project/pull/222721