Enable mypy check for torch/_inductor/codegen/common.py (#106199)
Fixes #105230
Summary:
As suggested in [#105230](https://github.com/pytorch/pytorch/issues/105230) mypy checking is enabled in torch/_inductor/codegen/common.py.
After the fix:
`mypy --follow-imports=skip torch/_inductor/codegen/common.py
Success: no issues found in 1 source file`
Reviewers: @eellison
Pull Request resolved: https://github.com/pytorch/pytorch/pull/106199
Approved by: https://github.com/Skylion007, https://github.com/eellison
