[ROCm][CI] Guard CudaPlatform/RocmPlatform imports to fix test collection on cross-platform builds#37617

DarkLight1337 merged 5 commits intovllm-project:mainvllm-project/vllm:mainfrom

ROCm:akaratza_fix_kernelsROCm/vllm:akaratza_fix_kernelsCopy head branch name to clipboard