[clang] [Driver] Restore compiler-rt arch suffix for PS and Windows (PR #89775)

[Fangrui Song via cfe-commits]

MaskRay wrote:

We can add a release note.

There is a lot of path probing code in clangDriver.
clangDriver trusts the result and does its best to construct assembler/linker command lines.
This distributed build system use case is an unfortunate case where compilation depends on linking action behaviors like runtime library layouts.

There have been a few cases before and we did not write specific release notes for the driver behavior:

* https://reviews.llvm.org/D112906 (PPC64 probing glibc 2.34+)
* https://reviews.llvm.org/D127812 (AArch64 FMV testing -rtlib=compiler-rt)

https://github.com/llvm/llvm-project/pull/89775