[google_workspace] Use fingerprint to generate fixed document id to avoid having duplicates

[marc-gr]

What does this PR do?

Adds a fingerprint processor to generate fixed document ids.

Why is it important?

To avoid generating duplicate events.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b gw_fingerprint upstream/gw_fingerprint
git merge upstream/master
git push upstream gw_fingerprint

[leehinman]

LGTM

[elasticmachine]

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Build stats

• Build Cause: Pull request #25841 updated

• Start Time: 2021-05-26T07:19:54.197+0000

• Duration: 107 min 29 sec

• Commit: f7c8a30

Test stats 🧪

Test	Results
Failed	0
Passed	7193
Skipped	1193
Total	8386

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💚 Flaky test report

Tests succeeded.

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Test stats 🧪

Test	Results
Failed	0
Passed	7193
Skipped	1193
Total	8386

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b gw_fingerprint upstream/gw_fingerprint
git merge upstream/master
git push upstream gw_fingerprint