Provisioning: Add connection operator with health check updates (#116028)

* Add connection operator with health check updates

- Add ConnectionController to watch and reconcile Connection resources
- Add ConnectionStatusPatcher for updating connection status
- Add connection_operator.go entry point for standalone operator
- Register connection operator in pkg/operators/register.go
- Add connection controller to in-process setup in register.go
- Add unit tests for connection controller
- Add integration tests for health check updates

* Fix integration test: get latest version before update to avoid conflicts

* refactor: move repoFactory to operator-specific configs

- Remove repoFactory from shared provisioningControllerConfig
- Add repoFactory to repoControllerConfig and jobsControllerConfig
- This allows connection operator to run without repository setup

* Remove unneccesary comments

pkg/operators/provisioning/connection_operator.go

@@ -0,0 +1,86 @@
+package provisioning
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/grafana/grafana-app-sdk/logging"
+	"github.com/prometheus/client_golang/prometheus"
+	"k8s.io/client-go/tools/cache"
+
+	appcontroller "github.com/grafana/grafana/apps/provisioning/pkg/controller"
+	informer "github.com/grafana/grafana/apps/provisioning/pkg/generated/informers/externalversions"
+	"github.com/grafana/grafana/pkg/registry/apis/provisioning/controller"
+	"github.com/grafana/grafana/pkg/server"
+	"github.com/grafana/grafana/pkg/setting"
+)
+
+// RunConnectionController starts the connection controller operator.
+func RunConnectionController(deps server.OperatorDependencies) error {
+	logger := logging.NewSLogLogger(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+		Level: slog.LevelDebug,
+	})).With("logger", "provisioning-connection-controller")
+	logger.Info("Starting provisioning connection controller")
+
+	controllerCfg, err := getConnectionControllerConfig(deps.Config, deps.Registerer)
+	if err != nil {
+		return fmt.Errorf("failed to setup operator: %w", err)
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		<-sigChan
+		fmt.Println("Received shutdown signal, stopping controllers")
+		cancel()
+	}()
+
+	informerFactory := informer.NewSharedInformerFactoryWithOptions(
+		controllerCfg.provisioningClient,
+		controllerCfg.resyncInterval,
+	)
+
+	statusPatcher := appcontroller.NewConnectionStatusPatcher(controllerCfg.provisioningClient.ProvisioningV0alpha1())
+	connInformer := informerFactory.Provisioning().V0alpha1().Connections()
+
+	connController, err := controller.NewConnectionController(
+		controllerCfg.provisioningClient.ProvisioningV0alpha1(),
+		connInformer,
+		statusPatcher,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to create connection controller: %w", err)
+	}
+
+	informerFactory.Start(ctx.Done())
+	if !cache.WaitForCacheSync(ctx.Done(), connInformer.Informer().HasSynced) {
+		return fmt.Errorf("failed to sync informer cache")
+	}
+
+	connController.Run(ctx, controllerCfg.workerCount)
+	return nil
+}
+
+type connectionControllerConfig struct {
+	provisioningControllerConfig
+	workerCount int
+}
+
+func getConnectionControllerConfig(cfg *setting.Cfg, registry prometheus.Registerer) (*connectionControllerConfig, error) {
+	controllerCfg, err := setupFromConfig(cfg, registry)
+	if err != nil {
+		return nil, err
+	}
+
+	return &connectionControllerConfig{
+		provisioningControllerConfig: *controllerCfg,
+		workerCount:                  cfg.SectionWithEnvOverrides("operator").Key("worker_count").MustInt(1),
+	}, nil
+}