[clang] [CIR] Upstream Exceptions EHTypeIdOp (PR #172558)

[Andy Kaylor via cfe-commits]

https://github.com/andykaylor approved this pull request.

This looks OK, but as discussed on https://github.com/llvm/llvm-project/pull/172713 it is ABI-specific. Of course, we will need this when the high-level CIR is lowered to an ABI-specific form (which should probably happen in the recently-added CXXABILowering pass).

https://github.com/llvm/llvm-project/pull/172558