Build system and CI improvements

[zichguan-amd]

Build system

• GPU_RUNTIME deprecation:
  HipPlatform.cmake introduced ROCM_EXAMPLES_GPU_LANGUAGE and deprecated GPU_RUNTIME, but not all examples migrated, which generates a lot of deprecation warnings with default settings. All CMake projects should complete the migration and remove GPU_RUNTIME usage. Need docs update.
• Change GPU_RUNTIME in Makefiles as well
• Resolve Check hipSPARSELt for supported architectures #342 and Consult hipTensor to determine if an arch is supported when building their examples #333 considering 1d19858
• Match TheRock and unify ROCM_INSTALL_DIR and ROCM_ROOT to use ROCM_PATH instead

CI

• Add Makefile testing to TheRock CI:
  Need to be able to set ROCM_PATH in Makefile. A lot of the examples still use hardcoded /opt/rocm path.
• Add nightly RHEL 8 CI workflow
• Test TheRock + CUDA support to eventually migrate CUDA workflows to use TheRock

[zichguan-amd]

@sshi-amd feel free to tackle any bullet point and create sub-issues