MDEV-24161: shortcut OQGRAPH dependency checks if disabled

Reviewer: Brad Smith

storage/oqgraph/CMakeLists.txt

@@ -39,6 +39,10 @@ int main() { return 0; }
 ENDIF()
 ENDFUNCTION()
 
+IF(PLUGIN_OQGRAPH STREQUAL "NO")
+  RETURN()
+ENDIF()
+
 IF(NOT DEFINED OQGRAPH_OK)
   CHECK_OQGRAPH()
   IF (NOT OQGRAPH_OK)