Storage: Remove entity store (#91233)

pkg/storage/unified/sql/db/service.go

@@ -5,6 +5,13 @@ import (
 	"database/sql"
 )
 
+const (
+	DriverPostgres = "postgres"
+	DriverMySQL    = "mysql"
+	DriverSQLite   = "sqlite"
+	DriverSQLite3  = "sqlite3"
+)
+
 // DBProvider provides access to a SQL Database.
 type DBProvider interface {
 	// Init initializes the SQL Database, running migrations if needed. It is