Rename Product Intelligence to Analytics Instrumentation

What does this MR do and why?

This MR renames "Product Intelligence" to "Analytics Instrumentation" because the group was renamed and keeping the old name for reviews would be confusing. Details can be found in gitlab-org/gitlab#408799 (closed)

The accompanying MR for the main repo is gitlab-org/gitlab!119489 (merged)

Refactoring the team member's handbook files so that they are correctly shown as reviewers is covered by gitlab-com/www-gitlab-com!123985 (merged).

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