Improve RBAC UI to Attach Policy to a Group

[kesarwam]

When you try to attach a policy to a group in the RBAC UI then few issues:

• It shows only 5 policies.
• There is no scroll bar or next page.
• Filtering is also very limited. Filter looks for "starts with" instead of substring and it is case sensitive.

[github-actions[bot]]

This issue is now marked as stale after 90 days of inactivity, and will be closed soon. To keep it, mark it with the "no stale" label.

[arielshaqed]

Related: #7168.