Docs: Realign several CE docs that diverged from EE unnecessarily

What does this MR do?

This is the first MR in my personal project of finding the CE docs that have diverged from their EE counterparts. By aligning them, there will be fewer ee_compat_check fails when these docs are edited, and less ports to EE needed.

This first batch contains docs from /doc/administration and /doc/api (plus one that was just missing a newline). They all seem to have diverged when a Doc was changed in the EE Repo, but it was not EE-Only content, and the change should have been back-ported to CE.

The fact that this MR passed ee_compat_check and does not need an EE Port seems to indicate that it properly puts the docs back in sync.

Related issues

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/57137

Author's checklist

• Apply the correct labels and milestone
• Crosslink the document from the higher-level index
• Crosslink the document from other subject-related docs
• Feature moving tiers? Make sure the change is also reflected in features.yml
• Correctly apply the product badges and tiers
• Port the MR to EE (or backport from CE): always recommended, required when the ee-compat-check job fails

Review checklist

• Your team's review (required)
• PM's review (recommended, but not a blocker)
• Technical writer's review (required)
• Merge the EE-MR first, CE-MR afterwards