Add quantization/legalization for `stablehlo.add` and respective pipeline changes.
Add quantization/legalization for `stablehlo.add` and respective pipeline changes.

* Added `enable_full_int_quantization` in `StaticRangePtqPreset` to determine full int quantization. This value will be `false` by default, meaning only compute-heavy ops will be quantized unless specified.
* Added tests for the above config change.
* Follow up tests will include e2e python tests.
