qcl: fix grafana issue with hostname and deployer script

The function get_grafana_url reads ingress.hosts[0] specifically, which
is a broken assumption. We should fix this by looking at root_url
instead in another PR.

config/clusters/qcl/support.values.yaml

@@ -30,10 +30,10 @@ grafana:
       allowed_organizations: 2i2c-org QuantifiedCarbon
   ingress:
     hosts:
-      - grafana.qcl.2i2c.cloud
       - grafana.quantifiedcarbon.com
+      - grafana.qcl.2i2c.cloud
     tls:
       - secretName: grafana-tls
         hosts:
-          - grafana.qcl.2i2c.cloud
           - grafana.quantifiedcarbon.com
+          - grafana.qcl.2i2c.cloud