[AOTInductor] Reuse generated kernels between constant graph and main graph (#121564)
Summary: We copy the src_to_kernel from constant graph to main graph so that we could avoid generating duplicating kernels. And pass throught the name counter such that no duplicated names will be generated.
Test Plan: Included in commit
Differential Revision: D54706767
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121564
Approved by: https://github.com/desertfire, https://github.com/chenyang78
