K8SPG-531: remove error on cluster creation

https://perconadev.atlassian.net/browse/K8SPG-531

DESCRIPTION

Problem: Sometimes after the creation of the cluster, the operator has the following error in the logs:

2024-03-18T10:12:47.525Z    ERROR   Reconciler error    {"controller": "perconapgcluster", "controllerGroup": "pgv2.percona.com", "controllerKind": "PerconaPGCluster", "PerconaPGCluster": {"name":"test-pg-db","namespace":"test2"}, "namespace": "test2", "name": "test-pg-db", "reconcileID": "5060d1b6-b7d7-42db-ba50-5b8d44d216cc", "error": "get PostgresCluster: PostgresCluster.postgres-operator.crunchydata.com \"test-pg-db\" not found", "errorVerbose": "PostgresCluster.postgres-operator.crunchydata.com \"test-pg-db\" not found\nget PostgresCluster\ngithub.com/percona/percona-postgresql-operator/percona/controller/pgcluster.(*PGClusterReconciler).Reconcile\n\t/go/src/github.com/percona/percona-postgresql-operator/percona/controller/pgcluster/controller.go:245\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Reconcile\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.3/pkg/internal/controller/controller.go:119\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.3/pkg/internal/controller/controller.go:316\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.3/pkg/internal/controller/controller.go:266\nsigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2\n\t/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.3/pkg/internal/controller/controller.go:227\nruntime.goexit\n\t/usr/local/go/src/runtime/asm_amd64.s:1650"}
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem
    /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.3/pkg/internal/controller/controller.go:266
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2
    /go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.3/pkg/internal/controller/controller.go:227

Cause: Operator tries to get the cluster immediately after creating it and fails. On the next reconcile everything is fine.

Solution: The operator should not attempt to retrieve the cluster immediately after creation.

CHECKLIST

Jira

[x] Is the Jira ticket created and referenced properly?
[x] Does the Jira ticket have the proper statuses for documentation (Needs Doc) and QA (Needs QA)?
[x] Does the Jira ticket link to the proper milestone (Fix Version field)?

Tests

[ ] Is an E2E test/test case added for the new feature/change?
[ ] Are unit tests added where appropriate?

Config/Logging/Testability

[x] Are all needed new/changed options added to default YAML files?
[x] Are the manifests (crd/bundle) regenerated if needed?
[x] Did we add proper logging messages for operator actions?
[x] Did we ensure compatibility with the previous version or cluster upgrade process?
[x] Does the change support oldest and newest supported PG version?
[x] Does the change support oldest and newest supported Kubernetes version?

Test name	Status
custom-extensions	passed
demand-backup	passed
init-deploy	passed
monitoring	passed
operator-self-healing	passed
scaling	passed
scheduled-backup	passed
self-healing	passed
start-from-backup	passed
telemetry-transfer	passed
upgrade-minor	passed
users	passed
We run 12 out of 12

percona / percona-postgresql-operator

K8SPG-531: remove error on cluster creation #746

DESCRIPTION

CHECKLIST