[X86][Costmodel] Load/store i64/f64 Stride=3 VF=16 interleaving costs

This required huge amount of assembly surgery, but i think this is about right.

The only sched models that for cpu's that support avx2
but not avx512 are: haswell, broadwell, skylake, zen1-3

For load we have:
https://godbolt.org/z/z11crMEcj - for intels `Block RThroughput: =20.0`; for ryzens, `Block RThroughput: <=18.0`
So could pick cost of `25`.

For store we have:
https://godbolt.org/z/eqT4ze3j4 - for intels `Block RThroughput: =24.0`; for ryzens, `Block RThroughput: <=16.0`
So we could pick cost of `24`.

I'm directly using the shuffling asm the llc produced,
without any manual fixups that may be needed
to ensure sequential execution.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D111031