[CK Tile] Add gemm universal preshuffle to MX GEMM (#5647)
## Motivation
Add gemm universal preshuffle support to existing MX GEMM pipeline.
The straightforward way to do this is to port the `mx_flatmm` pipeline
to the existing `gemm_mx` framework.
## Technical Details
The `mx_flatmm` pipeline was not deleted, to allow for
back-compatibility.
## Test Plan
Add `preshuffle` option to example: `tile_example_mx_gemm`.
Add new configurations with enabled preshuffle to the existing
`test/ck_tile/gemm_mx` tests.
## Test Result
Example and tests were successful on `gf950` architecture in the `Alola`
cluster.
## Submission Checklist
- [x] Look over the contributing guidelines at
https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.
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Co-authored-by: Fernando Jiménez <fernando.jimenez@streamhpc.com>
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