Update on "[ET-VK][int4] patch 4-bit source transformation quantizer to support linear modules with biases"

While LLaMa does not have biases, there are some models which will have biases in their linear modules.

Add support in the source transform quantizer for biases.

Differential Revision: [D69072087](https://our.internmc.facebook.com/intern/diff/D69072087/)

[ghstack-poisoned]

Author: Nathanael See