[WIP][MPACT] add parallelization with OpenMP to MPACT

[yinying-lisa-li]

1. Add omp passes to the pipeline.
2. Add parallel strategy option and omp thread option.
3. Enable printing IR for testing.

TODO:

1. MLIR PR approval and MLIR bump.
2. Make sure the openmp lib can be found.
3. How to test it in Github workflow? Should the build include omp as runtime?