Enable Grafana extensions at build time. (#11752)

* extensions: import and build

* bus: use predefined error

* enterprise: build script for enterprise packages

* poc: auto registering services and dependency injection

(cherry picked from commit b5b1ef875f905473af41e49f8071cb9028edc845)

* poc: backend services registry progress

(cherry picked from commit 97be69725881241bfbf1e7adf0e66801d6b0af3d)

* poc: minor update

(cherry picked from commit 03d7a6888b81403f458b94305792e075568f0794)

* ioc: introduce manuel ioc

* enterprise: adds setting for enterprise

* build: test and build specific ee commit

* cleanup: test testing code

* removes example hello service

pkg/setting/setting.go

@@ -45,9 +45,11 @@ var (
 	InstanceName string
 
 	// build
-	BuildVersion string
-	BuildCommit  string
-	BuildStamp   int64
+	BuildVersion    string
+	BuildCommit     string
+	BuildStamp      int64
+	Enterprise      bool
+	ApplicationName string
 
 	// Paths
 	LogsPath         string
@@ -486,6 +488,11 @@ func NewConfigContext(args *CommandLineArgs) error {
 		return err
 	}
 
+	ApplicationName = "Grafana"
+	if Enterprise {
+		ApplicationName += " Enterprise"
+	}
+
 	Env = Cfg.Section("").Key("app_mode").MustString("development")
 	InstanceName = Cfg.Section("").Key("instance_name").MustString("unknown_instance_name")
 	PluginsPath = makeAbsolute(Cfg.Section("paths").Key("plugins").String(), HomePath)