x-pack/filebeat/module/rabbitmq: add handling of authentication data

[efd6]

What does this PR do?

This adds access/authentication-related fields to RabbitMQ documents.

Why is it important?

These can be useful in a security context.

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.

Author's Checklist

• [ ]

How to test this PR locally

Related issues

• Closes Filebeat module RabbitMQ - add ECS authentication fields for SIEM #31159

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Build stats

• Start Time: 2022-06-14T06:24:07.825+0000

• Duration: 76 min 47 sec

Test stats 🧪

Test	Results
Failed	0
Passed	2124
Skipped	166
Total	2290

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[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 31159-rabbitmq upstream/31159-rabbitmq
git merge upstream/main
git push upstream 31159-rabbitmq

[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 31159-rabbitmq upstream/31159-rabbitmq
git merge upstream/main
git push upstream 31159-rabbitmq

[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 31159-rabbitmq upstream/31159-rabbitmq
git merge upstream/main
git push upstream 31159-rabbitmq

[kaiyan-sheng]

lgtm