fix: Fix panic in BloomStore initialisation (#13457)

The initialisation of the `BloomStore` service failed with a panic if the index gateways were configured to use `ring` mode.

This happened, because the bloom store requires to wire up the configuration for the shipper store, see
https://github.com/grafana/loki/blob/1a508b0aa/pkg/loki/modules.go#L864-L867

At this time, the index gateway ring manager wasn't initialized yet, leading to a `nil` pointer dereference.

This PR fixes the issue by adding the index gateway ring as dependency of the bloom store so it gets initialised first.

Signed-off-by: Christian Haudum <christian.haudum@gmail.com>

pkg/loki/loki.go

@@ -673,7 +673,7 @@ func (t *Loki) setupModuleManager() error {
 	mm.RegisterModule(RuleEvaluator, t.initRuleEvaluator, modules.UserInvisibleModule)
 	mm.RegisterModule(TableManager, t.initTableManager)
 	mm.RegisterModule(Compactor, t.initCompactor)
-	mm.RegisterModule(BloomStore, t.initBloomStore)
+	mm.RegisterModule(BloomStore, t.initBloomStore, modules.UserInvisibleModule)
 	mm.RegisterModule(BloomCompactor, t.initBloomCompactor)
 	mm.RegisterModule(BloomCompactorRing, t.initBloomCompactorRing, modules.UserInvisibleModule)
 	mm.RegisterModule(BloomPlanner, t.initBloomPlanner)
@@ -718,6 +718,7 @@ func (t *Loki) setupModuleManager() error {
 		BloomCompactor:           {Server, BloomStore, BloomCompactorRing, Analytics, Store},
 		BloomPlanner:             {Server, BloomStore, Analytics, Store},
 		BloomBuilder:             {Server, BloomStore, Analytics, Store},
+		BloomStore:               {IndexGatewayRing},
 		PatternIngester:          {Server, MemberlistKV, Analytics},
 		PatternRingClient:        {Server, MemberlistKV, Analytics},
 		IngesterRF1RingClient:    {Server, MemberlistKV, Analytics},