[clang] [Clang][Sema] Extend test coverage for SVE/SME builtin usage. (PR #156908)

[Kerry McLaughlin via cfe-commits]

https://github.com/kmclaughlin-arm approved this pull request.

Thank you for answering my questions @paulwalker-arm, LGTM.

https://github.com/llvm/llvm-project/pull/156908