[clang] [clang][codegen] Don't mark "int" TBAA on FP libcalls with indirect args (PR #108853)

[Benjamin Maxwell via cfe-commits]

MacDue wrote:

Note the first commit (https://github.com/llvm/llvm-project/pull/108853/commits/6db9f6d56f0bbd56d017156f858eae68653fbd1b) shows a correctness issue with what's currently upstream as the `load x86_fp80` is incorrectly marked with "int" TBAA metadata (overwriting its metadata for long double).

https://github.com/llvm/llvm-project/pull/108853