Add arch node selector for hybrid clusters

Currently, all of the lens-metrics components are multi-arch except for kube-state-metrics.  On a hybrid cluster this can be scheduled for arm, arm64 or other nodes so the pod will never come up.

- kube-state-metrics image only supports amd64 - https://github.com/kubernetes/kube-state-metrics/issues/1037.  There is a PR for this, but it hasn't been merged yet and seems to be held up.  Alternatively we could switch to use a different image: https://hub.docker.com/r/carlosedp/kube-state-metrics/tags but just limiting the state metrics to amd64 is the easier option

Signed-off-by: Jon Stelly <967068+jonstelly@users.noreply.github.com>

src/features/metrics/14-kube-state-metrics-deployment.yml.hb

@@ -28,6 +28,11 @@ spec:
                   operator: In
                   values:
                   - linux
+              - matchExpressions:
+                - key: beta.kubernetes.io/arch
+                  operator: In
+                  values:
+                  - amd64
       serviceAccountName: kube-state-metrics
       containers:
       - name: kube-state-metrics