added env FIREBASE_TOKEN to deploy at CI/CD

[yasinkocak]

Checklist

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Description

Allow to use env FIREBASE_TOKEN while deploying on CI/CD

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[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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Corporate signers

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[yasinkocak]

@googlebot I signed it!

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[yasinkocak]

issue #2523 #2482 #2327

[alessio-libardi]

Please someone review this PR.

[ammaarpatel99]

Just wondering if there is any progress on this

[YogliB]

anyone reviewing this?

[jamesdaniels]

Sorry for this being slow, API additions have to wait until the next minor release is planned. 6.1 is dropping shortly. There's already a PR here #2327 that I'm aiming to pull in.