Add check against firestore nightly

[wu-hui]

This PR adds a new optional check to run Firestore integration tests against Firestore Nightly Environment.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 0f48b6d

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

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[google-oss-bot]

Size Report ¹

Affected Products

No changes between base commit (efa116b) and merge commit (ba19319).

Test Logs

• Base (efa116b): https://github.com/firebase/firebase-js-sdk/actions/runs/7106629530
• Merge (ba19319): https://github.com/firebase/firebase-js-sdk/actions/runs/7170166022

1. https://storage.googleapis.com/firebase-sdk-metric-reports/8C3QKkhsca.html

[google-oss-bot]

Size Analysis Report ¹

Affected Products

No changes between base commit (efa116b) and merge commit (ba19319).

Test Logs

• Base (efa116b): https://github.com/firebase/firebase-js-sdk/actions/runs/7106629530
• Merge (ba19319): https://github.com/firebase/firebase-js-sdk/actions/runs/7170166022

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

[DellaBitta]

Please update the pull request summary with details about this change so that if need to look at this PR in the future, it's very obvious to us what it does.

[wu-hui]

Please update the pull request summary with details about this change so that if need to look at this PR in the future, it's very obvious to us what it does.

Done.