[ServerApp] Add integration tests for FirebaseServerApp

[DellaBitta]

Discussion

Add integration tests for the automatic login of Auth users when initializing Auth with an instance of FirebaseServerApp.

Testing

Local testing and CI execution.

Note: CI Failures are unrelated to this change, and occur in the main branch as well.

API Changes

N/A

[changeset-bot]

⚠️ No Changeset found

Latest commit: ef3736b

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

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[google-oss-bot]

Size Report ¹

Affected Products

No changes between base commit (8e6ab2d) and merge commit (b0c8277).

Test Logs

• Base (8e6ab2d): https://github.com/firebase/firebase-js-sdk/actions/runs/7546737014
• Merge (b0c8277): https://github.com/firebase/firebase-js-sdk/actions/runs/7613294999

1. https://storage.googleapis.com/firebase-sdk-metric-reports/1bxP38Amcv.html

[google-oss-bot]

Size Analysis Report ¹

Affected Products

No changes between base commit (8e6ab2d) and merge commit (b0c8277).

Test Logs

• Base (8e6ab2d): https://github.com/firebase/firebase-js-sdk/actions/runs/7546737014
• Merge (b0c8277): https://github.com/firebase/firebase-js-sdk/actions/runs/7613294999

1. https://storage.googleapis.com/firebase-sdk-metric-reports/qqtby0BD0c.html