make group count stats configurable

[lazy-ninja]

Description & motivation 💭

Group by execution statuses queries incur significant cost on the relational DB. So, making it configurable. Fixes: https://github.com/temporalio/ui/issues/2432

Screenshots (if applicable) 📸

Design Considerations 🎨

Testing 🧪

How was this tested 👻

• [ ] Manual testing
• [ ] E2E tests added
• [ ] Unit tests added - [will add if this can be accepted]

Steps for others to test: 🚶🏽‍♂️🚶🏽‍♀️

Checklists

Draft Checklist

Merge Checklist

Issue(s) closed

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Name	Status	Preview	Comments	Updated (UTC)
holocene	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 20, 2024 11:56am

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