Chore: Enable Go linter gocritic (#26224)

* Chore: Enable gocritic linter

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/services/alerting/notifier.go

@@ -16,6 +16,7 @@ import (
 )
 
 // for stubbing in tests
+//nolint: gocritic
 var newImageUploaderProvider = func() (imguploader.ImageUploader, error) {
 	return imguploader.NewImageUploader()
 }