Port mhlo-quant-legalize-to-int pass to StableHLO

[sdasgup3]

This is the port of mhlo-quant-legalize-to-int pass to Stablehlo.

A bunch of tests needs to be updates based on:

• Different error message because of the differences in quantization verification for mhlo and stablehlo.
• Update check directive to accommodate pretty printing in stablehlo vs not pretty printed ops in mhlo (like dot_general)
• Modify tests with boradcast_in_dim to update the syntax of broadcast_dimension (from DenseIntElementsAttr to I64ArrayAttr)
• Convert a test with per-axis stablehlo.max with per-tensor stablehlo.max as max only supports per-tensor. The intent of the tests is preserved.

Also, updated the original code to address creation of attributes of type I64ArrayAttr instead of DenseIntElementsAttr.