[clang] [ASTContext] Add a break to nested switch in `encodeTypeForFunctionPointerAuth` (PR #99763)

[Paul Kirth via cfe-commits]

ilovepi wrote:

Ah, it looks like we had another set of these. I just filed https://github.com/llvm/llvm-project/issues/99901 after a similar issue was reported in LLD.

https://github.com/llvm/llvm-project/pull/99763