Give tests more specific names for easier debugging

[ianstanton]

Today, tembo-operator test instances and namespaces have names like test-coredb-35742. This makes it difficult to determine which test is running in a given namespace.

This PR updates these with more descriptive names related to the tests being performed. This will improve the test debugging experience.

Example:

❯ k get ns
NAME                                  STATUS   AGE
calico-apiserver                      Active   19h
calico-system                         Active   19h
cert-manager                          Active   19h
cnpg-test                             Active   19h
default                               Active   19h
kube-node-lease                       Active   19h
kube-public                           Active   19h
kube-system                           Active   19h
local-path-storage                    Active   19h
minio                                 Active   19h
monitoring                            Active   19h
reflector                             Active   19h
tembo-system                          Active   19h
test-app-service-89647                Active   32s
test-backup-restore-13140             Active   32s
test-basic-cnpg-89746                 Active   32s
test-cnpg-metrics-create-86071        Active   32s
test-cnpg-pgparams-9725               Active   32s
test-delete-namespace-1254            Active   32s
test-ha-basic-cnpg-81469              Active   32s
test-ha-requires-load-81952           Active   32s
test-ha-two-replicas-22084            Active   32s
test-ha-upgrade-cnpg-14185            Active   32s
test-ha-verify-extension-39815        Active   32s
test-ingress-route-tcp-52121          Active   32s
test-ingress-route-tcp-adopt-3657     Active   32s
test-ingress-route-tcp-domain-74883   Active   32s
test-pooler-43699                     Active   32s
test-requires-load-6417               Active   32s
test-restart-postgres-27327           Active   32s
test-status-configs-75282             Active   32s
tigera-operator                       Active   19h
traefik                               Active   19h