This pull request changes the testing flow of smoke tests run with PRs
and merges to main. Previously, the same github action was run on pull
request and on merge to main. That action would run some unit, some
integration, and some smoke tests (tagged with #pr). Now, instead of
running the same action on PR and on merge, the on-merge action has been
updated to run all smoke tests on merge to main (not just the ones
tagged with #pr).

The smoke tests are broken up in this fashion because they are time
consuming. The idea is to keep the PR set of tests under 7 minutes. If
the merge-to-main tests fail, the PR author will be notified via email
by github as long as they have their notification settings properly
configured (https://github.com/settings/notifications):

<img width="1089" alt="image"
src="https://github.com/user-attachments/assets/7e889ce4-6813-4499-a946-40dc3cfac34d">

### QA Notes

All smoke tests should pass.