[6.0.0-1] Missing nvidia headers break cross-compilation

Description:

Nvidia platform headers used to be a part of hipamd when that was deprecated the headers were moved out of hipclr into hipother.

This change breaks cross compilation of hip programs targeting CUDA.

Additional info:

• package version(s): 6.0.0-1
• config and/or log files:
• link to upstream bug report, if any:

Steps to reproduce:

1. Install hip-runtime-amd and cuda
2. Attempt to cross compile any hip project

Example Command to cross compile:

HIP_PLATFORM=nvidia cmake . -B build -GNinja -DCMAKE_HIP_PLATFORM=nvidia