Linkify cluster count in cluster group table

[abhi1693]

NetBox version

v3.2.2-dev

Python version

3.8

Steps to Reproduce

1. Create a cluster group named: Test1
2. Create clusters named: C1 and C2 and add them to the Test1 group
3. Go to the ClusterGroup table and notice the cluster count the a

Expected Behavior

Should be able to click on the cluster count in the cluster group table and should get a filtered list of clusters by cluster group ID on the cluster table clusters

Observed Behavior

The link for cluster count is missing

[jeremystretch]

Should be added to the cluster types table as well.