Improve descriptions of config fields to select objects

[iliakur]

What does this PR do?

Motivation

Support case. I noticed the descriptions could use some love:

• reduce duplication by stating something once and then referencing that later
• remove some confusing wording
• for some fields the description now reflects the actual implementation

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached
• If the PR doesn't need to be tested during QA, please add a qa/skip-qa label.

[iliakur]

Current dependencies on/for this PR:

• master
  • PR Improve descriptions of config fields to select objects #14045 👈

This comment was auto-generated by Graphite.

[codecov]

Codecov Report

Merging #14045 (308976c) into master (2e0149f) will not change coverage.
The diff coverage is n/a.

❗ Current head 308976c differs from pull request most recent head fac8725. Consider uploading reports for the commit fac8725 to get more accurate results

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rabbitmq	95.63% <ø> (ø)

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[FlorentClarret]

Looks good to me

[kayayarai]

Grammar/style fixes, but 👍

[github-actions]

The validations job has failed; please review the Files changed tab for possible suggestions to resolve.

[iliakur]

Thanks @kayayarai I'll go ahead with the merge without waiting for a reapproval since I applied your suggestions :D