[clang] Support target names with dots in more utilities (PR #65812)

[James Henderson via cfe-commits]

jh7370 wrote:

@dankm, is there a particular reason you haven't merged this change in yet?

FWIW, the formatter check failed for some reason, but I'm not sure it's related to any formatting issue. Please verify by running clang-format on your changes before merging.

https://github.com/llvm/llvm-project/pull/65812