[clang] [lldb] [llvm] Remove some `try_compile` CMake checks for compiler flags (PR #92953)

[Vlad Serebrennikov via cfe-commits]

Endilll wrote:

Here are CE links with the set of minimum required compilers that should cover almost all the changes I made:
https://godbolt.org/z/j98xzhrGa
https://godbolt.org/z/errv4WhfP
https://godbolt.org/z/vnoh8YqEP
Windows-targeted flags were tested both on MSVC on CE, and on clang-cl 5.0 locally.

https://github.com/llvm/llvm-project/pull/92953