remove namespace from helm chart

Helm should be able to set the namespace for the operator at deploy time
via the --namespace option.  Use yq to remove all references to
namespaces in the helm chart prior to publishing.

Update CI process to create namespace during install.

Resolves #907

.github/workflows/ci.yaml

@@ -63,4 +63,4 @@ jobs:
       - name: Build and install helm chart
         run: |
           IMG=awx-operator-ci make helm-chart
-          helm install --wait my-awx-operator ./charts/awx-operator
+          helm install --wait my-awx-operator --namespace awx --create-namespace ./charts/awx-operator