Migrate CI runners from Depot back to GitHub-hosted runners (#18347)

## Summary
- Replaces all `depot-ubuntu-24.04` runners with `ubuntu-latest`
- Replaces all `depot-ubuntu-24.04-8` runners with
`ubuntu-latest-8-cores`
- Updates storybook build cache keys in ci-front.yaml to reflect the
runner name change

Reverts the temporary Depot migration introduced in #18163 / #18179
across all 23 workflow files.

.github/workflows/ci-utils.yaml

@@ -22,7 +22,7 @@ concurrency:
 jobs:
   danger-js:
     timeout-minutes: 5
-    runs-on: depot-ubuntu-24.04
+    runs-on: ubuntu-latest
     if: github.event.action != 'closed'
     steps:
       - uses: actions/checkout@v4
@@ -35,7 +35,7 @@ jobs:
 
   congratulate:
     timeout-minutes: 3
-    runs-on: depot-ubuntu-24.04
+    runs-on: ubuntu-latest
     if: github.event.action == 'closed' && github.event.pull_request.merged == true
     steps:
       - uses: actions/checkout@v4