Docs: Add and clarify user access management
What does this MR do?
Clarifies existing wording on user access management and adds separate sections on basic group SAML and SCIM pages.
Support gets questions on this all the time, so it'd be great to prevent further tickets or at least be able to point people to a specific section.
Related issues
Info from gitlab-com/support/support-team-meta#1634 (comment 218542823)
Author's checklist
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Follow the Documentation Guidelines and Style Guide. -
If applicable, update the permissions table. -
Link docs to and from the higher-level index page, plus other related docs where helpful. -
Apply the documentation label.
Review checklist
All reviewers can help ensure accuracy, clarity, completeness, and adherence to the Documentation Guidelines and Style Guide.
1. Primary Reviewer
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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.
2. Technical Writer
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Optional: 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.
3. Maintainer
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Review by assigned maintainer, who can always request/require the above reviews. Maintainer's review can occur before or after a technical writer review. -
Ensure a release milestone is set. -
If there has not been a technical writer review, create an issue for one using the Doc Review template.