Linkerd - edge-21.7.1

edge-21.7.1

This edge release adds support for emitting Kubernetes events in the identity
controller when issuing leaf certificates. The event includes the identity,
expiry date, and a hash of the certificate. Additionally, this release contains
many dependency updates for the control plane's components, and it includes a
fix for an issue with the clusterNetworks healthcheck.

• Updated the identity controller to emit Kubernetes events when successfully
  issuing leaf certificates to injected pods.
• Fixed an issue in linkerd check where the clusterNetworks healthcheck
  would fail if the podCIDR field is omitted from a node's spec.
• Removed unnecessary controller port-forward logic from the bin/web script.