[rocm-libraries] ROCm/rocm-libraries#8227 (commit 75c30d5)

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## Motivation

Recently, the way flags are sent down to the intrinsics was changed in
CK Tile. At the point where the WarpGemm is invoked, an arbitrary number
of template parameters can be passed, and these are passed down all the
way to the lowest level intrinsics wrappers. Here
`WarpGemmParamsParser<>` is used to extract flags for the intrinsics.

In this MR we adapt the the unification framework (amdgcn_mma struct and
MmaPipelines) to work in the same way. By doing this, there is no longer
a point in our custom intrinsic Flag structs, so these are removed.

Unrelated but I also tried removing the MmaPipeline flags because they
arn't used for anything except CTranspose, which is already available.
This also make test_amdgcn_mma_pipeline completely redundant so removed
that as well.