Unified Storage: Adds overrides service to resource server (#113794)

* first pass of adding quotas service resource server

* passes prom reg as param

init quota service as part of server params

* init quota service as part of server params

* adds config and only creates quota service when overrides file path is defined

* when quota service enabled, check quota on create and log result

* update log message

* adds tests for quota service

* adds tests for config reloading when the file changes

* fix linter errors

* fix comment

* use startAndAwaitRunning

* Simplifies quotas service. Call manager.GetConfig() when getting quota instead of watching for changes.

* adds tracing to quotas service

* adds nsr attributes to traces when getting quotas and resource stats

* update comment

* update comment

remove check for nil overrides since it will (should) never happen

* fix linter error

* refactors naming to overrides service

checks quotas in separate function

* fix quotas naming

* fixes more quotas -> overrides naming

* use logger from ctx

* linter - remove trailing whitespace

* log FromContext() when checking quotas

* adds events to spans instead of create new spans

updates tenant -> namespace naming

few other minor fixes

pkg/storage/unified/client.go

@@ -211,6 +211,19 @@ func newClient(opts options.StorageOptions,
 			serverOptions.QOSQueue = queue
 		}
 
+		// only enable if an overrides file path is provided
+		if cfg.OverridesFilePath != "" {
+			overridesSvc, err := resource.NewOverridesService(ctx, cfg.Logger, reg, tracer, resource.ReloadOptions{
+				FilePath:     cfg.OverridesFilePath,
+				ReloadPeriod: cfg.OverridesReloadInterval,
+			})
+			if err != nil {
+				return nil, err
+			}
+
+			serverOptions.OverridesService = overridesSvc
+		}
+
 		server, err := sql.NewResourceServer(serverOptions)
 		if err != nil {
 			return nil, err