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-shared.yaml

@@ -22,7 +22,7 @@ jobs:
     needs: changed-files-check
     if: needs.changed-files-check.outputs.any_changed == 'true'
     timeout-minutes: 30
-    runs-on: depot-ubuntu-24.04
+    runs-on: ubuntu-latest
     env:
       NODE_OPTIONS: '--max-old-space-size=4096'
     strategy:
@@ -47,7 +47,7 @@ jobs:
   ci-shared-status-check:
     if: always() && !cancelled()
     timeout-minutes: 5
-    runs-on: depot-ubuntu-24.04
+    runs-on: ubuntu-latest
     needs: [changed-files-check, shared-test]
     steps:
       - name: Fail job if any needs failed