Revert D23798016: [FX] s/get_param/get_attr/
Test Plan: revert-hammer
Differential Revision:
D23798016 (https://github.com/pytorch/pytorch/commit/c941dd3492535b3e09f4cb3f60c80b02f5e04c3f)
Original commit changeset: 1d2f3db1994a
fbshipit-source-id: 974d930064b37d396c5d66c905a63d45449813e5
