Filter/Sort Feature Flag Groups
### Problem to solve
Being able to sort and filter feature flags groups would allow users to more efficiently manage, find and view these items.
### Intended users
* [Parker (Product Manager)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#parker-product-manager)
* [Delaney (Development Team Lead)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#delaney-development-team-lead)
* [Sasha (Software Developer)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#sasha-software-developer)
* [Presley (Product Designer)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#presley-product-designer)
* [Devon (DevOps Engineer)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#devon-devops-engineer)
* [Sidney (Systems Administrator)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#sidney-systems-administrator)
* [Sam (Security Analyst)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#sam-security-analyst)
* [Dana (Data Analyst)](https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/#dana-data-analyst)
Personas are described at https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas/ -->
* Developers who create feature flags
* QA engineers enabling/disabling flags
* Release managers who want to control which features are released and to which customer base
* Support engineers that wish to release features to beta customers or test version to fix bugs for specific customers
### Further details
<!-- Include use cases, benefits, and/or goals (contributes to our vision?) -->
### Proposal
Add the ability to sort and filter feature flag groups.
### Permissions and Security
### Documentation
### Testing
### What does success look like, and how can we measure that?
### What is the type of buyer?
### Links / references
issue