Rename Dev Advocacy team, part 4: team page details, URL updates

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• Rename Dev Advocacy team, part 4: team page details, URL updates

This MR addresses more names and URL changes, summarized:

1. Sort the team member table alphanumeric
2. Fix team member titles, and update specialities
3. Update the Dev Advocacy request issue template URLs, based on gitlab-com/marketing/developer-relations/developer-advocacy/developer-advocacy-meta!16 (merged)
4. Update stable counterparts
5. Update Dev Avocacy handbook URLs in other handbooks
6. Fix raw Slack channel URLs that used the old name still
7. Update the job family update URLs
8. Update project URLs

Related to https://gitlab.com/gitlab-com/marketing/developer-relations/developer-advocacy/developer-advocacy-meta/-/issues/389

Author and Reviewer Checklist

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• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added, and the content is SAFE
• Assign reviewers for this MR to the correct Directly Responsible Individual/s (DRI)
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the Maintained by section on the page being edited
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• For transparency, share this MR with the audience that will be impacted.
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  • Department: If the update affects your department, share the MR in your department Slack channel
  • Company: If the update affects all (or the majority of) GitLab team members, post an update in #whats-happening-at-gitlab linking to this MR
    • For high-priority company-wide announcements work with the internal communications team to post the update in #company-fyi and align on a plan to circulate in additional channels like the "While You Were Iterating" Newsletter

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