[inductor] Fix slow tests not being run in CI (#97841)
PyTorch slow tests are run in CI with `PYTORCH_TEST_SKIP_FAST=1` which skips any
test not decorated with `@slowTest`. That means tests marked with
`skipIf(not TEST_WITH_SLOW)` are never run.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/97841
Approved by: https://github.com/jansel
