Changes in dex function to work for both target cluster as well as sub-clusters along with few enhancements

Depends-On: https://review.opendev.org/c/airship/airshipctl/+/792316

Change-Id: I13f97faec5523b6ae86cd0a578d4b76c8c1344a2

manifests/function/dex-aio/dex-cert-issuer.yaml

@@ -1,8 +1,7 @@
 apiVersion: cert-manager.io/v1alpha2
 kind: Issuer
 metadata:
-  name: workload-cluster-ca-issuer
-  namespace: default
+  name: dex
 spec:
   ca:
-    secret: dex-apiserver-secret
+    secretName: dex-apiserver-secret

manifests/function/dex-aio/dex-helmrelease.yaml

@@ -1,18 +1,3 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: dex
----
-# Dex Helm Charts from Helm Repository (Helm Collator)
-apiVersion: source.toolkit.fluxcd.io/v1beta1
-kind: HelmRepository
-metadata:
-  name: dex-helm-repo
-  namespace: collator
-spec:
-  interval: 5m
-  url: http://helm-chart-collator.collator.svc:8080
----
 # Dex Helm Charts from Git Repository
 # apiVersion: source.toolkit.fluxcd.io/v1beta1
 # kind: GitRepository
@@ -29,10 +14,7 @@ apiVersion: helm.toolkit.fluxcd.io/v2beta1
 kind: HelmRelease
 metadata:
   name: dex-aio
-  namespace: default
 spec:
-  releaseName: dex-aio
-  targetNamespace: dex
   interval: 5m
   chart:
     spec:
@@ -40,7 +22,7 @@ spec:
       # Referencing Dex Helm charts from Helm Collator repo
       sourceRef:
         kind: HelmRepository
-        name: dex-helm-repo
+        name: helm-repo
         namespace: collator
       # Referencing Dex Helm charts from Git repo
       # sourceRef:
@@ -60,7 +42,7 @@ spec:
         tls:
           cert_manager: true
           issuer:
-            name: workload-cluster-ca-issuer
+            name: dex
             kind: Issuer
       oidc:
         client_id: function-kubernetes

manifests/function/dex-aio/kustomization.yaml

@@ -2,5 +2,5 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-- dex-cert-issuer.yaml
 - dex-helmrelease.yaml
+- dex-cert-issuer.yaml