[NNC] Add Tests for Dynamic Shape Fusion Change default fusion strategy (#71651)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71651
The only tests that regress are because chunk NYI, the other tests that I touched were passing just because the `assertAllFused` wasn't working correctly. That, and we're no longer compiling conv/matmul w dynamic shapes
Test Plan: Imported from OSS
Reviewed By: navahgar
Differential Revision: D33801500
Pulled By: eellison
fbshipit-source-id: 074118ab4a975b7db876a4fcdfb9483afb879e79
(cherry picked from commit abaa7948c18bf2dc885efd9323a92449d321afbc)
