Paginate workspaces list

What does this MR do and why?

It adds pagination to the Workspaces list.

Screenshots or screen recordings

How to set up and validate locally

1. Enable the remote development feature flag Feature.enable(:remote_development_feature_flag)
2. You might need to run gdk restart rails-web so rails reconfigure the routes.
3. Open http://gdk.test:3000/-/remote_development/workspaces in your Web Browser.
4. You should see a list of workspaces like the screenshots above.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #409092 (closed)