[clang] [clang-cl][flang][dxc] Fix opts exposed to clang-cl/dxc by mistake (PR #118640)

[Haohai Wen via cfe-commits]

HaohaiWen wrote:

> > Better to double check with author who specified those CLOption.
> 
> Do you mean the person that added `CLOption` to these flags? That was @tarunprabhu, but IIUC that was by mistake; his intention was to extend these flags only to Flang.
> 
> Otherwise `-Xlinker` has been around for very long. I guess I will revert these flags to be clang and flang only, then open issues for the discussion of potentially enabling them to clang-cl.

Some of our project have already used -Xlinker on Windows. Is there any equivalent flag for CL?
Can we keep this flag for CL in this PR and open an issue to discuss whether it should be disabled for CL?

https://github.com/llvm/llvm-project/pull/118640