Propagate symbolic dimensions through idioms like x.view(y.size()) (#61975)

Propagate symbolic dimensions through idioms like x.view(y.size()) (#61975)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61975

Propagate symbolic dimensions through size calls. We did this by associating SymbolicSizes with integer inputs by looking through their constructors for `x.size(1)` or `x.size()` nodes.

Test Plan: Imported from OSS

Reviewed By: gchanan

Differential Revision: D30196948

Pulled By: eellison

fbshipit-source-id: 377fc1d2f6d396c52dc0e87fa814b15720f1414e