[NFC][docs][HIP] Update HIP docs around `hipstdpar` and SPIR-V#124803

Merged

AlexVlx merged 3 commits intollvm:mainfrom

AlexVlx:update_hip_docs

Jan 28, 2025

Commits on Jan 28, 2025

Add missing `hipstdpar` documentation; remove reference to temporary SPIR-V limitation which got lifted.
AlexVlx
committed
Fix inline literal, add RDNA4 to the list of architectures needing interposition mode.
AlexVlx
committed
Hopefully final fix for RST issues.
AlexVlx
committed