🌱 gha: release: only push images for tags and main branch

[joelanford]

It looks like ever since we enabled the merge queue, we've been pushing a bunch of merge queue built image tags to quay.

Check out the "gh-readonly-queue-main" tags at https://quay.io/repository/operator-framework/operator-controller?tab=tags&tag=latest

Description

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

[netlify]

✅ Deploy Preview for olmv1 ready!

Name	Link
🔨 Latest commit	3ef8545
🔍 Latest deploy log	https://app.netlify.com/sites/olmv1/deploys/675b05832be0be0008453a5d
😎 Deploy Preview	https://deploy-preview-1520--olmv1.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.68%. Comparing base (610fff9) to head (3ef8545).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1520   +/-   ##
=======================================
  Coverage   74.68%   74.68%           
=======================================
  Files          42       42           
  Lines        3271     3271           
=======================================
  Hits         2443     2443           
  Misses        652      652           
  Partials      176      176           

Flag	Coverage Δ
e2e	52.06% <ø> (-0.10%)	⬇️
unit	57.99% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.