DevOps Adoption should not only fetch the first 200 groups

Summary

Currently, the DevOps Adoption feature only fetches the first 200 groups when loading the page. This results in only a subset of groups being displayed in the Add/Remove groups modal when an instance has more than 200 groups.

Steps to reproduce

• Browse to the DevOps Adoption feature, instance or group level (instance level on staging works well as there are well over 200 groups).
• Open the Add/Remove groups modal.
• Inspect the groups present in the modal.

What is the expected correct behavior?

We likely want to show all groups, but there are performance concerns around this.

Proposal

• Display the adoption table(s) as soon as the adoption data loads
• Load all groups in the search modal
• Display a loading in the modal while the modal data is loading