Set up generate 2FA recovery code procedure
What does this MR do?
We do not have an explicit procedure for regenerating 2FA codes. Any attempt to "piggyback" on existing procedures (at least any method that I can think of) would lead to errors.
Related issues
Address the issue described in !25779 (closed)
Author's checklist
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Follow the Documentation Guidelines and Style Guide. 
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If applicable, update the permissions table. 
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Link docs to and from the higher-level index page, plus other related docs where helpful. 
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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. 
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Ensure a release milestone is set. 
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If there has not been a technical writer review, create an issue for one using the Doc Review template. 
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