[Dynamo] No graph break for explicit calling Conv{1/2/3}d.forward & ConvTranspose{1/2/3}d.forward (#99015)
Before this PR, if users call ```Conv2d(x)```, dynamo handles it well(no graph break) and puts a ```call_module``` op in the FX graph. However, if users explicitly call ```Conv2d.forward(x)``` in another ```forward``` function, the inlining would be failed(caused graph break). This PR fixed this issue by translating the explicit ```Conv2d.forward(x)``` to ```Conv2d(x)```.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99015
Approved by: https://github.com/jansel, https://github.com/wconstab
