CORE-232: user supportSummary should use resource_type_admin

[davidangb]

Ticket: https://broadworkbench.atlassian.net/browse/CORE-232

What:

• change the GET /api/admin/v1/user/email/{email}/supportSummary API to require the admin_read_summary_information action on the user resource_type_admin instead of requiring workbench admin
• remove the groupMembershipCounts.unsynchronized count from the support summary. This number was incorrect and unhelpful.

See #1617 for the original implementation.

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PR checklist

• I've followed the instructions if I've made any changes to the API, especially if they're breaking changes
• I've filled out the Security Risk Assessment (requires Broad Internal network access) and attached the result to the JIRA ticket

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud