Support bundles: Refactor registry into separate service (#62945)

* add bundle registry service to avoid dependency cycles

* move user support bundle collector to user service

* move usage stat bundle implementation to usage stats

* add info for background service

* fix remaining imports

* whitespace

pkg/services/supportbundles/bundleregistry/service.go

@@ -0,0 +1,32 @@
+package bundleregistry
+
+import (
+	"github.com/grafana/grafana/pkg/infra/log"
+	"github.com/grafana/grafana/pkg/services/supportbundles"
+)
+
+// Service is the service that registers support bundle collectors.
+type Service struct {
+	collectors map[string]supportbundles.Collector
+	log        log.Logger
+}
+
+// NewService creates a new support bundle collector register service.
+func ProvideService() *Service {
+	return &Service{
+		collectors: make(map[string]supportbundles.Collector),
+		log:        log.New("support-bundle-collector-registry"),
+	}
+}
+
+func (s *Service) RegisterSupportItemCollector(collector supportbundles.Collector) {
+	if _, ok := s.collectors[collector.UID]; ok {
+		s.log.Warn("Support bundle collector with the same UID already registered", "uid", collector.UID)
+	}
+
+	s.collectors[collector.UID] = collector
+}
+
+func (s *Service) Collectors() map[string]supportbundles.Collector {
+	return s.collectors
+}