[clang] [llvm] [KCFI][NFC] Rename the !kcfi_type Function metadata to !cfi_type (PR #109080)

[Fangrui Song via cfe-commits]

MaskRay wrote:

> > I feel that we should make such renaming at this time.
> 
> But then you propose that we make the renaming now. (??)

Sorry, it's a typo. We should not do the renaming, unless there is strong argument renaming is useful.

https://github.com/llvm/llvm-project/pull/109080