Unified Storage Search: Add sprinkles (#97820)

* Wire up sprinkles to oss and enterprise. Fetching sprinkles not implemented yet.

* Adds wireset for initializing document builders. Had to init it when creating the service to avoid cyclical imports.

* updates to int64 for stats

* adds config for sprinklesApiServer and gets sprinkles from there when its present

* add comment for later

* adds feature toggle for sprinkles. returns empty results when flag not enabled.

* adds unified storage config setting for sprinkles apiserver page limit

* fixes bug where dashboard uid was not getting set

* when creating dashboard summary, use metadata.name as the dashboard uid

* cleans up wire. use existing oss and enterprise sets to generate doc builders

* remove old wireset

* fix linter - adds missing arg for doc builders

* update dashboard stats in tests

* updates test-data dashboards

* log a warning instead of returning an error if we can't get sprinkles for a namespace

* dont read uid from dashboard json

pkg/setting/setting.go

@@ -523,12 +523,14 @@ type Cfg struct {
 	ShortLinkExpiration int
 
 	// Unified Storage
-	UnifiedStorage     map[string]UnifiedStorageConfig
-	IndexPath          string
-	IndexWorkers       int
-	IndexMaxBatchSize  int
-	IndexFileThreshold int
-	IndexMinCount      int
+	UnifiedStorage              map[string]UnifiedStorageConfig
+	IndexPath                   string
+	IndexWorkers                int
+	IndexMaxBatchSize           int
+	IndexFileThreshold          int
+	IndexMinCount               int
+	SprinklesApiServer          string
+	SprinklesApiServerPageLimit int
 }
 
 type UnifiedStorageConfig struct {