add new entrypoint script and fix unit tests

Author: gkech

internal/patroni/reconcile.go

@@ -105,6 +105,10 @@ func InstancePod(ctx context.Context,
 	}
 
 	container.Command = []string{"patroni", configDirectory}
+	// K8SPG-708 introduces a new entrypoint script in the percona-docker repository.
+	if inCluster.CompareVersion("2.7.0") >= 0 {
+		container.Command = []string{"/usr/local/bin/entrypoint.sh", "patroni", configDirectory}
+	}
 
 	container.Env = append(container.Env,
 		instanceEnvironment(inCluster, inClusterPodService, inPatroniLeaderService,

internal/patroni/reconcile_test.go

@@ -123,6 +123,7 @@ func TestInstancePod(t *testing.T) {
 			expectedSpec: `
 containers:
 - command:
+  - /usr/local/bin/entrypoint.sh
   - patroni
   - /etc/patroni
   env: