Improve compile time (AIRRtToNpuPass) #551
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This reduces total end-to-end compile time from 7 seconds to 0.5 seconds on one model. At some point I had a model which was spending 2+ minutes in this air pass, I am optimistic that this optimization reduces that too (I can't recall the matmul dimensions).
I am currently trying to build mlir-air outside of IREE to check locally that all the tests pass, but I'm also just throwing this to CI now to check.