[libc-commits] [libc] [libc][NFC] Rename LIBC_COMPILER_HAS_FLOAT128 to LIBC_HAS_FLOAT128 for consistency (PR #81870)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

ok, that SGTM.  So then in this PR do you plan to s/LIBC_HAS_FLOAT128/LIBC_TYPES_HAS_FLOAT128/ or a follow up PR?

If a follow up, please put [your thoughts](https://github.com/llvm/llvm-project/pull/81870#issuecomment-1948099726) into an issue and link to it for now until the conversions you listed are complete.

https://github.com/llvm/llvm-project/pull/81870