Misc error message improvements (#19369)
Summary:
Stack from [ghstack](https://github.com/ezyang/ghstack):
* **#19369 [jit] Misc error message improvements**
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Pull Request resolved: https://github.com/pytorch/pytorch/pull/19369
Pulled By: driazati
Differential Revision: D14982975
fbshipit-source-id: 18dae3d56c3a01280f66223a69e2e52d15d3b651
