Update base for Update on "[ET-VK][AOT] Enable exporting Q8 Quantized Linear + Convolution"

As title. Introduce fusion patterns to enable fusing quantized convolution and linear graph patterns into a custom op.

## Changes

Introduce the concept of using custom pattern detection functions to detect graph patterns rather than solely relying on SubgraphMatcher. The issue with SubgraphMatcher is that a large number of graph patterns may need to be exported to obtain variants for different combinations of decompositions/quantization workflows. Having a custom detection function improves maintainability.

Implement detection + replacement functions for quantized linear and quantized conv2d.

Differential Revision: [D81323425](https://our.internmc.facebook.com/intern/diff/D81323425/)

[ghstack-poisoned]

Author: ssjia