Query library: requiresDevMode dummy backend (#56466)

* query library - dummy backend

* fix tests

* dont explicitly marshall backend dataresponse

* skip integration tests

* null check for tests

* added query library to codeowners

* null check for tests

* lint

pkg/api/api.go

@@ -284,6 +284,10 @@ func (hs *HTTPServer) registerRoutes() {
 			apiRoute.Group("/search-v2", hs.SearchV2HTTPService.RegisterHTTPRoutes)
 		}
 
+		if hs.QueryLibraryHTTPService != nil && !hs.QueryLibraryHTTPService.IsDisabled() {
+			apiRoute.Group("/query-library", hs.QueryLibraryHTTPService.RegisterHTTPRoutes)
+		}
+
 		// current org
 		apiRoute.Group("/org", func(orgRoute routing.RouteRegister) {
 			userIDScope := ac.Scope("users", "id", ac.Parameter(":userId"))