[Fusilli] Pick compiler fixes and change dispatch count checks for conv3d

[sjain-stanford]

Compiler fix: iree-org/iree#22320
Issue: iree-org/iree#22312

[IanWood1]

The reason CPU dispatch count improved is because we are generalizing convs. This is most likely causing really slow perf on CPU. It doesn't seem to be too problematic but this can be disabled with --iree-global-opt-experimental-disable-conv-generalization and there is an open IREE issue iree-org/iree#21955 to fix the bad perf

[IanWood1]

LGTM

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[sjain-stanford]

this can be disabled with --iree-global-opt-experimental-disable-conv-generalization and there is an open IREE issue iree-org/iree#21955 to fix the bad perf

If this is only an intermittent state and given we're not tracking CPU perf atm, let's leave this as-is for now and hope it gets pulled the next time we bump IREE.