- Show Knative install button on group/instance cluster pages
- Allow Knative to be installed on group/instance clusters
- Add feature specs for installing applications on group/instance
  clusters
- Add changelog entry
- Update docs to reflect that Knative can now be installed on
  group-level and instance-level clusters

The new component also implements several improvements in the
knative domain editor workflow:

- Display a loading spinner when saving changes in the domain name
- Display success toast message indicating changes were saved
successfully.
- Display error message in the contraty occurs

Move cluster applications manager tests from karma to jest. Fixes
some migration issues related with timeouts, and HTTP request
expectations.

A runner installed on a cluster will now use the
cluster's `cluster_type` as its `runner_type`.

Show a loading spinner while Ingress/Knative IP is being assigned

Added the functionality to edit the Knative domain

Includes juptyer hostname in the post request
Adds tests

Removes double quoted string

Updates components to use a slot to allow to reuse the clipboard button
Adds tests