[7.x](backport #25841) [google_workspace] Use fingerprint to generate fixed document id to avoid having duplicates

[mergify]

This is an automatic backport of pull request #25841 done by Mergify.

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💚 Build Succeeded

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• Build Cause: Pull request #25866 opened

• Start Time: 2021-05-26T10:04:21.047+0000

• Duration: 103 min 37 sec

• Commit: 2cd3db9

Test stats 🧪

Test	Results
Failed	0
Passed	7164
Skipped	1193
Total	8357

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Test stats 🧪

Test	Results
Failed	0
Passed	7164
Skipped	1193
Total	8357