Deploy from main branch instead of release branch

[coreycarvalho]

User Story - Business Need

Currently, we use the main branch to deploy to perf and release to deploy to staging and production. This means that the main branch isn't serving any purpose other than being a holding ground for perf deploys. In order to facilitate a smoother CI/CD pipeline, we want to deploy everything from main and get rid of the release branch.

• [x] Ticket is understood, and QA has been contacted (if the ticket has a QA label).

User Story(ies)

As a VA Notify developer I want to deploy to staging and production from main So that we can streamline our CI/CD process.

Additional Info and Resources

Acceptance Criteria

• [x] Github actions/workflows are updated to deploy from main instead of release
• [x] Github actions/workflows that cut the release branch are removes
• [x] All existing pipeline steps remain the same. (Approvals, for example)
• [x] This work is added to the sprint review slide deck (key win bullet point and demo slide)

QA Considerations

• Verify that things still work as expected (tag is cut on main, main is deployed to higher envs, etc)

Potential Dependencies

[kbelikova-oddball]

Hey team! Please add your planning poker estimate with Zenhub @coreycarvalho @cris-oddball @EvanParish @k-macmillan @kalbfled @mchlwellman