[clang] Revert "[HIP][AMDGPU] Use non-LTO pipeline for non-RDC in the linker wrapper (#201135)" (PR #206961)

[Shilei Tian via cfe-commits]

shiltian wrote:

> this is causing issues now
>
> we could make that the default for no-RDC in a follow-up.

Okay.

https://github.com/llvm/llvm-project/pull/206961