Refactor flux uninstall command

- deletes Flux components (deployments and services)
- deletes Flux RBAC (service accounts, cluster roles and cluster role bindings)
- removes the Kubernetes finalizers from Flux custom resources
- deletes Flux custom resource definitions and custom resources
- deletes the namespace where Flux was installed
- preserves the Kubernetes objects and Helm releases that were reconciled on the cluster by Flux

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.github/workflows/e2e.yaml

@@ -195,7 +195,7 @@ jobs:
           ./bin/flux check
       - name: flux uninstall
         run: |
-          ./bin/flux uninstall --crds --silent --timeout=10m
+          ./bin/flux uninstall --silent
       - name: Debug failure
         if: failure()
         run: |