[nnc] Provide helpful error messages about turning off the fuser (#64516)

[nnc] Provide helpful error messages about turning off the fuser (#64516)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64516

If fuser compilation fails due to a bug (which should be highly
unlikely at this point) we want to direct the user how to unblock themselves by
disabling fusion, in addition to requesting that they report a bug.
ghstack-source-id: 137398537

Test Plan: existing tests

Reviewed By: ZolotukhinM

Differential Revision: D30758051

fbshipit-source-id: 98be89f1b1d4fb3bc816f5b2634c618b9297930e