Documentation: Fix API services parameter tables

What does this MR do?

In some of the parameter tables on https://docs.gitlab.com/ee/api/services.html we say all in the required column. The value in this column should be either true or false.

Example:

This MR changes the value to false and adds the default to the description column

Author's checklist (required)

• Follow the Documentation Guidelines and Style Guide.
• If you have Developer permissions or higher:
  • Ensure that the product tier badge is added to doc's h1.
  • Apply the documentation label, plus:
    • The corresponding DevOps stage and group labels, if applicable.
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    • development guidelines and Documentation guidelines when changing docs under development/documentation/*.
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  • Assign the designated Technical Writer.

Do not add the feature, frontend, backend, ~"bug", or database labels if you are only updating documentation. These labels will cause the MR to be added to code verification QA issues.

When applicable:

• [-] Update the permissions table.
• [-] Link docs to and from the higher-level index page, plus other related docs where helpful.
• [-] Add the product tier badge accordingly.
• [-] Add GitLab's version history note(s).
• [-] Add/update the feature flag section.

Review checklist

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1. Primary Reviewer

• Review by a code reviewer or other selected colleague to confirm accuracy, clarity, and completeness. This can be skipped for minor fixes without substantive content changes.

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• Technical writer review. If not requested for this MR, must be scheduled post-merge. To request for this MR, assign the writer listed for the applicable DevOps stage.
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For suggestions that you are confident don't need to be reviewed, change them locally and push a commit directly to save others from unneeded reviews. For example:

• Clear typos, like this is a typpo.
• Minor issues, like single quotes instead of double quotes, Oxford commas, and periods.

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3. Maintainer

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