[clang] [clang][ARM] Fix warning for VFP function calls from interrupts. (PR #91870)

[Chris Copeland via cfe-commits]

chrisnc wrote:

I've rebased, updated the warning text and release notes, and created https://github.com/llvm/llvm-project/issues/95359 for the future improvement to warn about calling interrupt handlers.

https://github.com/llvm/llvm-project/pull/91870