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/sql/backend.go

@@ -14,6 +14,7 @@ import (
 	"github.com/jackc/pgx/v5/pgconn"
 	"github.com/lib/pq"
 	"github.com/prometheus/client_golang/prometheus"
+	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
 	"go.opentelemetry.io/otel/trace/noop"
 	"go.uber.org/atomic"
@@ -263,7 +264,11 @@ func (b *backend) Stop(_ context.Context) error {
 
 // GetResourceStats implements Backend.
 func (b *backend) GetResourceStats(ctx context.Context, nsr resource.NamespacedResource, minCount int) ([]resource.ResourceStats, error) {
-	ctx, span := b.tracer.Start(ctx, tracePrefix+"GetResourceStats")
+	ctx, span := b.tracer.Start(ctx, tracePrefix+"GetResourceStats", trace.WithAttributes(
+		attribute.String("namespace", nsr.Namespace),
+		attribute.String("group", nsr.Group),
+		attribute.String("resource", nsr.Resource),
+	))
 	defer span.End()
 
 	req := &sqlStatsRequest{