Re-categorize non-team-planning tables
What does this MR do and why?
Related to #434970 (closed)
https://manojmj.gitlab.io/tenant-scale-schema-progress/sharding_keys mis-categorizes these tables as belonging to Team Planning:
commit_user_mentions
customer_relations_organizations
issue_customer_relations_contacts
merge_request_user_mentions
Edited by euko