Fix size_hint call sites failing on unbacked SymInts (#110520)
Summary: Unbacked SymInts can't get a `sizevars.size_hint` due to being data-dependent. #109893 has added a new `fallback` parameter to `sizevars.size_hint` to specify the fallback value in cases like unbacked SymInt. In this PR we add more of those.
Test Plan: CI
Reviewers:
Subscribers:
Tasks:
Tags:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/110520
Approved by: https://github.com/jansel, https://github.com/ezyang
