Add new pack-peel pipeline with 4 tiling levels

[jtuyls]

Adds a new pipeline with an additional level of tiling for matmul-like operations on the outer dimension. This should reduce the DDR BW requirements by caching more data slices on L2/MemTile.

[yzhang93]

As per our discussion in the meeting, this temporary pipeline LGTM. We'll leave the work for cleanup pipelines as follow-ups.

However, I have another idea for your consideration. If all the matmul shapes and tests work for this new pipeline, we can make the new pipeline "pack-peel" and the old one "pack-peel-basic" or something. In this way, we can run all the ObjectFifo tests in ci without changing the default pipeline, and it's easier when we are ready to deprecate the old pipeline.

One more thing, we need a lowering-strategy test for the new pipeline.

[jtuyls]

However, I have another idea for your consideration. If all the matmul shapes and tests work for this new pipeline, we can make the new pipeline "pack-peel" and the old one "pack-peel-basic" or something.

Not all the tests are functional. I have fixes for matmul + truncf, batch_matmul which I can get in in follow ups. And I am still working on an issue with matmul_transpose_b.

[jtuyls]

One more thing, we need a lowering-strategy test for the new pipeline.

Added the lowering strategy lit tests.

[yzhang93]

LGTM, thanks!