Analytics: Enable grafana and plugin update checks to be operated independently (#46352)

* add separate cfg for controlling plugin update checks

* https

* add specific version note to docs

* pr feedback

* fixup

pkg/services/updatechecker/grafana.go

@@ -28,7 +28,7 @@ type GrafanaService struct {
 
 func ProvideGrafanaService(cfg *setting.Cfg) *GrafanaService {
 	return &GrafanaService{
-		enabled:        cfg.CheckForUpdates,
+		enabled:        cfg.CheckForGrafanaUpdates,
 		grafanaVersion: cfg.BuildVersion,
 		httpClient:     http.Client{Timeout: 10 * time.Second},
 		log:            log.New("grafana.update.checker"),

pkg/services/updatechecker/plugins.go

@@ -29,7 +29,7 @@ type PluginsService struct {
 
 func ProvidePluginsService(cfg *setting.Cfg, pluginStore plugins.Store) *PluginsService {
 	return &PluginsService{
-		enabled:          cfg.CheckForUpdates,
+		enabled:          cfg.CheckForPluginUpdates,
 		grafanaVersion:   cfg.BuildVersion,
 		httpClient:       &http.Client{Timeout: 10 * time.Second},
 		log:              log.New("plugins.update.checker"),