fix: app proxy isNamespaced returns nil in template failing the install on lower kubernetes versions (#820)

Author: ilia-medvedev-codefresh

charts/gitops-runtime/values.yaml

@@ -49,6 +49,8 @@ global:
     cluster: https://kubernetes.default.svc
     # -- Defines whether this is a Codefresh hosted runtime. Should not be changed.
     codefreshHosted: false
+    # -- Defines if runtime is namespace scoped. Required for running multiple runtimes in the same cluster
+    singleNamespace: false
     # -- Ingress settings
     ingress:
       # -- if set to true, the pre-install hook will validate the existance of appropriate values, but *will not* attempt to make a web request to the ingress host