Update TESTOWNERS - add engineering (#12597)

Author: naspirato

.github/TESTOWNERS

@@ -55,8 +55,8 @@
 #YDB Postgres Compatibility @rekby TEAM:@ydb-platform/postgres-compatibility
 /ydb/tests/postgres_integrations @ydb-platform/postgres-compatibility
 
-#YDB Engineering Team @maximyurchuk 
-   # - tbd
+#YDB Engineering Team @maximyurchuk TEAM:@ydb-platform/engineering
+ydb/tests/functional/tpc @ydb-platform/engineering
 
 #Orphan components @spuchin @maximyurchuk @kirrysin @ydb-platform/duty
 /ydb/services/ydb @ydb-platform/duty