feat(apiserver): refactor the hooking mechanism for standalone apiserver (#93001)

It now uses a full build handler chain that can be passed from up top to `SetupConfig`.

Co-authored-by: Charandas Batra <charandas.batra@grafana.com>

pkg/cmd/grafana/apiserver/server.go

@@ -122,7 +122,7 @@ func (o *APIServerOptions) Config(tracer tracing.Tracer) (*genericapiserver.Reco
 		setting.BuildVersion,
 		setting.BuildCommit,
 		setting.BuildBranch,
-		o.factory.GetOptionalMiddlewares(tracer)...,
+		o.factory.GetBuildHandlerChainFunc(tracer, o.builders),
 	)
 	return serverConfig, err
 }