[JIT] Make InsertInstruction overflow check a warning instead of fatal (#46369)
Summary:
This diff restores previous behavior of silently allow overflowing when inserting instructions. The behavior was changed recently in https://github.com/pytorch/pytorch/issues/45382. But it started to break some existing use cases that haver overflow problems.
Restoring original behavior but throw a warning to to unblock existing use cases where overflowing happens.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46369
Reviewed By: kwanmacher, wanchaol, fbhuba
Differential Revision: D24324345
Pulled By: gmagogsfm
fbshipit-source-id: 1c0fac421d4de38f070e21059bbdc1b788575bdf
