[X86] Add scheduler classes for zmm vector reg-reg move instructions

Basic zmm reg-reg moves (with predication) are more port limited than xmm/ymm moves, so we need to add a separate class for them.

We still appear to be missing move-elimination patterns for most of the intel models, which looks to be one of the main diffs for basic codegen analysis between llvm-mca and uops.info

Load/stores are a bit messier and might be better handled as overrides.

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