Test coordinator compaction metrics with multiple managers

**Is your feature request related to a problem? Please describe.**

Need to ensure that compaction metrics from the coordinator work properly with multiple managers.

**Describe the solution you'd like**

Update existing test or add new test to start multiple manager and have multiple compaction resource groups and ensure correct metrics are seen.

**Additional context**

This is follow on work for #6324

No file or test name is provided. Start by reviewing the existing coordinator compaction metrics test or implementation and the follow-on issue #6324, then run the relevant test target. Done means multiple managers and compaction resource groups produce the correct coordinator metrics.

Written by the indexing model from the issue text.