[clang] [llvm] [clang] Reland Add tanf16 builtin and support for tan constrained intrinsic (PR #94559)

[Farzon Lotfi via llvm-commits]

farzonl wrote:

@efriedma-quic If you have time could you take a look at this pr. It  is the same as the one you review just with more tests across more targets.  Problem from the first merge was because the  target base changes were tied up in the x86 backend change.  Since those have merged this pr should work just  fine now.

https://github.com/llvm/llvm-project/pull/94559