Update DRC exclusions model to match terminology.

DRC exclusions were originally written following the C++
pragma model (ie: allow this violation here).  However, the
"exclusion" terminology we used in the GUI suggests a model
model where the exclusions go away when the violation no
longer exists.

Fixes https://gitlab.com/kicad/code/kicad/issues/14351

pcbnew/python/scripting/pcbnew_scripting_helpers.cpp

@@ -183,7 +183,7 @@ BOARD* LoadBoard( wxString& aFileName, IO_MGR::PCB_FILE_T aFormat )
             // Best efforts...
         }
 
-        for( PCB_MARKER* marker : brd->ResolveDRCExclusions() )
+        for( PCB_MARKER* marker : brd->ResolveDRCExclusions( true ) )
             brd->Add( marker );
 
         brd->BuildConnectivity();