Discover RDS Flow: fix mfa required check (#48880)

Aurora based RDS instances (mysql or postgres) were not being correctly
parsed and would cause the isMFARequired check to fail because it was
lacking the protocol.

This PR fixes it.

web/packages/teleport/src/Discover/SelectResource/databases.tsx

@@ -462,8 +462,10 @@ export const DATABASES: ResourceSpec[] = [
 export function getDatabaseProtocol(engine: DatabaseEngine): DbProtocol {
   switch (engine) {
     case DatabaseEngine.Postgres:
+    case DatabaseEngine.AuroraPostgres:
       return 'postgres';
     case DatabaseEngine.MySql:
+    case DatabaseEngine.AuroraMysql:
       return 'mysql';
   }