[PyTorch] Inline Tensor keyset-checking methods & similar getters (#54806)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54806
These are all very small key set checks (or similar getters
like `dtype()`, and we clearly want them to be inlinable -- we've even
made them non-virtual for perf in TensorImpl and said so in
comments. Don't make LTO work to figure that out.
ghstack-source-id: 125060650
Test Plan: CI
Reviewed By: ezyang
Differential Revision: D27375016
fbshipit-source-id: 5c3dbfa38fa493c8f7e0ac4e5acd3598d5896558
