[X86][CodeGen] Prefer KMOVkk_EVEX than KMOVkk when EGPR is supported (#74048)

In memory fold table, we have

```
 {X86::KMOVDkk, X86::KMOVDkm, 0},
 {X86::KMOVDkk_EVEX, X86::KMOVDkm_EVEX, 0}
```

where `KMOVDkm_EVEX` can use EGPR as base and index registers, while
`KMOVDkm` can't. Hence, though `KMOVkk` does not have any GPR operands,
we prefer to use `KMOVDkk_EVEX` to help register allocation.

It will be compressed to `KMOVDkk` in EVEX2VEX pass if memory folding
does not happen.