[llvm] [X86][NFC] Added/Updated Trigonometric functions testcase (PR #127094)

[Evgenii Kudriashov via llvm-commits]

e-kud wrote:

@RKSimon @arsenm apparently we haven't got any tests for `llvm.{sin,cos}.*` and this revealed some inconsistency:
* for most of opcodes `half` and `fp128` tests are included into `CodeGen/X86/llvm.*.ll`
* for `sin` and `cos` (and other non-trigonometric intrinsics) they are part of `CodeGen/X86/fp16-libcalls.ll` and `CodeGen/X86/fp128-libcalls.ll`

Should we move `half` and `fp128` cases from `CodeGen/X86/llvm.*.ll` to `CodeGen/X86/{fp16,fp128}-libcalls.ll` or vice versa, or just keep it as is? What do you think would be better?

For GlobalISel it would be better to have `half` and `fp128` separately so we can enforce `global-isel=1` for testing

https://github.com/llvm/llvm-project/pull/127094