[clang] [Clang][Basic] Enable `__has_feature(cfi)` (PR #151348)

[via cfe-commits]

PiJoules wrote:

> My apologies for the force-push. Issue with git.
> 
> CI was failing with the error `missing sanitizer ignorelist`. My last commit adds the `-fno-sanitize-ignorelist` flag to some clang invocations in order to fix the issue.

`-fno-sanitize-ignorelist` shouldn't be needed here. What errors were you originally seeing?

https://github.com/llvm/llvm-project/pull/151348