add stride constraints to fallbacks (#88534)
Add stride/contiguity constraints to fallbacks so that inputs will be in the right stride permutation for the fallback kernel.
Improves perf of coat_lite_mini from 1.48415536054865 -> 2.010956856330101.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88534
Approved by: https://github.com/ngimel
