All get_attr node to be in64 type (#68818)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68818
Operator Support was blocking all node with dtype int64 from lowering. This diff ease the condition, for input from get_attr node(which are known not gonna be used for trt compute) to have dtype int64.
Reviewed By: brad-mengchi, 842974287
Differential Revision: D32609457
fbshipit-source-id: ea255f3281349a4254cb6abdeed671ab2c0216ba
