feat(goharbor): add anti-affinity to registry

This patch should provide a first draft for anti-affinity for pods in
the harbor deployment. This should help to spread harbor pods across
nodes, ensuring that a single-node failure doesn't take out the entire
application.

apps/base/goharbor/release.yaml

@@ -69,6 +69,18 @@ spec:
           limits:
             memory: 128Mi
             cpu: 250m
+      affinity:
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+          - weight: 100
+            podAffinityTerm:
+              labelSelector:
+                matchExpressions:
+                - key: component
+                  operator: In
+                  values:
+                  - registry
+              topologyKey: kubernetes.io/hostname
     chartmuseum:
       resources:
         requests: