[Relax][MetaSchedule] Support CPU weight prepack #17445
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This PR adds support for CPU weight prepacking. To be specific, this PR adds a new pass `AttachAttrLayoutFreeBuffers` to attach layout free buffers to the weight parameters, so that we can leverage MetaSchedule to optimize the prepacking process. After the pass and tuning, we introduce a new pass `SplitLayoutRewritePreproc` to split the layout rewrite pass into multiple functions, so that we can lift the parameters transform pass function with existing pass.
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This PR adds support for CPU weight prepacking. To be specific, this PR adds a new pass
AttachAttrLayoutFreeBuffersto attach layout free buffers to the weight parameters, so that we can leverage MetaSchedule to optimize the prepacking process.After the pass and tuning, we introduce a new pass
SplitLayoutRewritePreprocto split the layout rewrite pass into multiple functions, so that we can lift the parameters transform pass function with existing pass.