pytorch

f954c0a7 - [Pytorch][4/4 Static dispatch] Support multiple backends with multiple kernels (#76059)

[Pytorch][4/4 Static dispatch] Support multiple backends with multiple kernels (#76059) Summary: - Supports multiple backends with multiple kernels in static dispatch - Refactor static dispatch generators Pull Request resolved: https://github.com/pytorch/pytorch/pull/76059 ghstack-source-id: 154735166 Test Plan: ``` (pytorch) ~/fbsource └─ $ buck build --config pt.enable_lightweight_dispatch=1 --config pt.static_dispatch_backend="CPU;QuantizedCPU;CompositeExplicitAutograd" //xplat/caffe2/fb/lite_predictor:lite_predictor_flatbuffer ``` Reviewed By: bdhirsh Differential Revision: D35727473 fbshipit-source-id: 986ba3390c6e585fcf8477b6d069720ee1fbc90b (cherry picked from commit 6473990c208a78879985e4cdfb50960f5727ad5e)