fix: allow valuesFrom in gitSync.env

[mo-rieger]

closes: #42024

[boring-cyborg]

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[mo-rieger]

The failed test seems unrelated. Is there anything I could do? @hussein-awala

[kikefdezl]

I could really use this feature, would be nice to have soon

[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.

[jedcunningham]

Thanks @mo-rieger! Congrats on your first commit 🎉