Adding support for Vector512 `Equals`, `EqualsAny`, `op_Equality`, and `op_Inequality...

Adding support for Vector512 `Equals`, `EqualsAny`, `op_Equality`, and `op_Inequality`. (#83470)

* Implement `Vector512.Equals` by way of special `AVX512` intrinsic.

* Add Vector512 `Equals`, `EqualsAll/op_Equality` `op_Inequality`.

* Fix `vpmovm2x` instructions for `MoveMaskToVectorSpecial`.

* Move `Vector512` Equals into `gtNewSimdCmpOpNode`.

* Adds `EqualsAny`.

* Fix `kortestq` and `kortestd` opcode gen (W bit).

* Fix merge and update instr flags.

* Addressing review comments.

* Removing unnecessary files.

* Addressing review comments.

* Fixing bug.

* Fixing k reg display on x86.

* Setting Resets_ZF to right value.

* Fixing extract.

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Co-authored-by: Deepak Rajendrakumaran <deepak.rajendrakumaran@intel.com>
Co-authored-by: Tanner Gooding <tagoo@outlook.com>