Make DRC exclusions work in cli & python DRC

The way exclusions work is actually silly, and you can end up with your project file losing them too.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/11562

pcbnew/python/scripting/pcbnew_scripting_helpers.cpp

@@ -585,9 +585,15 @@ bool WriteDRCReport( BOARD* aBoard, const wxString& aFileName, EDA_UNITS aUnits,
                 }
             } );
 
+    aBoard->RecordDRCExclusions();
+    aBoard->DeleteMARKERs( true, true );
     engine->RunTests( aUnits, aReportAllTrackErrors, false );
     engine->ClearViolationHandler();
 
+    // now "resolve" the drc exclusions again because its the only way to set exclusion status on a marker
+    for( PCB_MARKER* marker : aBoard->ResolveDRCExclusions( false ) )
+        aBoard->Add( marker );
+
     // TODO: Unify this with DIALOG_DRC::writeReport
 
     FILE* fp = wxFopen( aFileName, wxT( "w" ) );