[Inductor] turn on vectorization with fallback for indirect indexing etc. (#98138)
Always do vectorization with scalar fallback for indirect indexing right now. We can vectorize the indirect indexing load/store by analyzing how the indirect indices are related to the loop variables. This will be done in future PRs.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/98138
Approved by: https://github.com/jansel
