[llvm] [test] Add missing tests for ldexpf128 and frexpf128 (PR #148794)

[Trevor Gross via llvm-commits]

tgross35 wrote:

This is like https://github.com/llvm/llvm-project/pull/148793 but the tests all crash because of https://github.com/llvm/llvm-project/issues/144006 (check annotations are from my fix at https://github.com/llvm/llvm-project/pull/148326).

Not sure if there is a way to skip tests specifically on Windows.

https://github.com/llvm/llvm-project/pull/148794