[1/N] Avoid skipping tests in sandcastle. (#61876)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61876
In the sandcastle environment, avoid skipping tests and instead just
"pass" these tests to avoid a large number of tasks being created which are not
actionable.
ghstack-source-id: 133846232
Test Plan: Test with `SANDCASTLE=1 TW_JOB_USER=sandcastle`
Reviewed By: rohan-varma
Differential Revision: D29779699
fbshipit-source-id: add71008830dfa6f456ce2365a2d70436b7b7a31
