Improve search index eviction (#111542)

* Modify index eviction mechanism such that unowned indexes are also evicted.

* Propagate OwnsIndex function to bleve backend

Fix tests.

Stop eviction goroutine when stopping backend.

Make linter happy.

Make sure we stop backend created by tests.

Review suggestion.

Removed newline.

pkg/storage/unified/sql/server.go

@@ -10,7 +10,6 @@ import (
 	"go.opentelemetry.io/otel/trace"
 
 	"github.com/grafana/authlib/types"
-	"github.com/grafana/dskit/ring"
 	"github.com/grafana/dskit/services"
 
 	infraDB "github.com/grafana/grafana/pkg/infra/db"
@@ -42,14 +41,10 @@ type ServerOptions struct {
 	Features       featuremgmt.FeatureToggles
 	QOSQueue       QOSEnqueueDequeuer
 	SecureValues   secrets.InlineSecureValueSupport
-	Ring           *ring.Ring
-	RingLifecycler *ring.BasicLifecycler
+	OwnsIndexFn    func(key resource.NamespacedResource) (bool, error)
 }
 
-// Creates a new ResourceServer
-func NewResourceServer(
-	opts ServerOptions,
-) (resource.ResourceServer, error) {
+func NewResourceServer(opts ServerOptions) (resource.ResourceServer, error) {
 	apiserverCfg := opts.Cfg.SectionWithEnvOverrides("grafana-apiserver")
 
 	if opts.SecureValues == nil && opts.Cfg != nil && opts.Cfg.SecretsManagement.GrpcClientEnable {
@@ -118,8 +113,7 @@ func NewResourceServer(
 	serverOptions.Search = opts.SearchOptions
 	serverOptions.IndexMetrics = opts.IndexMetrics
 	serverOptions.QOSQueue = opts.QOSQueue
-	serverOptions.Ring = opts.Ring
-	serverOptions.RingLifecycler = opts.RingLifecycler
+	serverOptions.OwnsIndexFn = opts.OwnsIndexFn
 
 	return resource.NewResourceServer(serverOptions)
 }