Add missing tolerations in linkerd-cni helm chart (#5368) (#5369)

The linkerd-cni helm chart is missing tolerations on the daemonset. This
prevents the linkerd-cni daemonset from being installed on all intended
nodes.

We use the same template partial as used in the main linkerd helm chart
to add tolerations if specified to the linkerd-cni daemonset spec.

Fixes #5368

Signed-off-by: Rishabh Jain <rishabh@onesignal.com>

charts/linkerd2-cni/templates/cni-plugin.yaml

@@ -184,6 +184,9 @@ spec:
       annotations:
         {{.Values.createdByAnnotation}}: {{default (printf "linkerd/helm %s" .Values.cniPluginVersion) .Values.cliVersion}}
     spec:
+      {{- if .Values.tolerations }}
+      {{- include "linkerd.tolerations" . | nindent 6 }}
+      {{- end }}
       nodeSelector:
         beta.kubernetes.io/os: linux
       hostNetwork: true

charts/linkerd2-cni/values.yaml

@@ -41,6 +41,11 @@ priorityClassName: ""
 proxyInjectAnnotation: linkerd.io/inject
 proxyInjectDisabled: disabled
 
+# -|- Tolerations section, See the 
+# [K8S documentation](https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/)
+# for more information
+#tolerations:
+
 #
 ## For Private docker registries, authentication is needed.
 # If the control plane service images are pulled from a