Add FP8 Support For CK Tile Group GEMM

[aris134]

Description

Please include a brief summary of the changes, relevant motivation and context.

Fixes https://github.com/ROCm/frameworks-internal/issues/15787

TODO:

• Add support for gfx942/gfx950
• Performance analysis and tuning

Type of change

• Documentation change (change only to the documentation, either a fix or a new content)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Infra/Build change
• Code refactoring

Changes

Please list the changes introduced in this PR:

• Enables mixed precision (fp8/bf8) support for CK tile grouped GEMM with tensor quantization on gfx942/gfx950

Checklist:

• I have read and followed the contributing guidelines
• The functionality is complete
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[matthiasdiener]

LGTM!

[ipanfilo]

With some nits