ProvisioningService: Change the ProvisioningService interface for easier extension (#32910)

* Made a public constructor in order to instantiate it from the service override

* Removed unused plugins.DataRequestHandler

* Added a Run and RunInitProvisioners methods that can be run from Enterprise

* Adding a mock for Run and RunInitProvisioners as well

pkg/services/provisioning/provisioning_mock.go

@@ -1,22 +1,28 @@
 package provisioning
 
+import "context"
+
 type Calls struct {
+	RunInitProvisioners                 []interface{}
 	ProvisionDatasources                []interface{}
 	ProvisionPlugins                    []interface{}
 	ProvisionNotifications              []interface{}
 	ProvisionDashboards                 []interface{}
 	GetDashboardProvisionerResolvedPath []interface{}
 	GetAllowUIUpdatesFromConfig         []interface{}
+	Run                                 []interface{}
 }
 
 type ProvisioningServiceMock struct {
 	Calls                                   *Calls
+	RunInitProvisionersFunc                 func() error
 	ProvisionDatasourcesFunc                func() error
 	ProvisionPluginsFunc                    func() error
 	ProvisionNotificationsFunc              func() error
 	ProvisionDashboardsFunc                 func() error
 	GetDashboardProvisionerResolvedPathFunc func(name string) string
 	GetAllowUIUpdatesFromConfigFunc         func(name string) bool
+	RunFunc                                 func(ctx context.Context) error
 }
 
 func NewProvisioningServiceMock() *ProvisioningServiceMock {
@@ -25,6 +31,14 @@ func NewProvisioningServiceMock() *ProvisioningServiceMock {
 	}
 }
 
+func (mock *ProvisioningServiceMock) RunInitProvisioners() error {
+	mock.Calls.RunInitProvisioners = append(mock.Calls.RunInitProvisioners, nil)
+	if mock.RunInitProvisionersFunc != nil {
+		return mock.RunInitProvisionersFunc()
+	}
+	return nil
+}
+
 func (mock *ProvisioningServiceMock) ProvisionDatasources() error {
 	mock.Calls.ProvisionDatasources = append(mock.Calls.ProvisionDatasources, nil)
 	if mock.ProvisionDatasourcesFunc != nil {
@@ -72,3 +86,11 @@ func (mock *ProvisioningServiceMock) GetAllowUIUpdatesFromConfig(name string) bo
 	}
 	return false
 }
+
+func (mock *ProvisioningServiceMock) Run(ctx context.Context) error {
+	mock.Calls.Run = append(mock.Calls.Run, nil)
+	if mock.RunFunc != nil {
+		return mock.RunFunc(ctx)
+	}
+	return nil
+}