[X86] Adjust vector shift costs to match SoG (Issue #54889)

znver1/2 models were incorrectly modelling the fpupipe (should be pipe2 for shift-by-scalar-amount and pipe1 for shift-by-element-amount) and znver1 ymm variants also require double pumping.

Now matches AMD SoG, Agner and instlatx64 numbers.

Thanks to @fabian-r for the report