cubicweb #4601191 Let DataFeedParser.extid2entity use raise_on_error [validation pending]

Currently, it uses a critical warning so that problem show up in tests, which is quite suboptimal. In the source code, there's a comment suggesting using a raise_on_error parameter as for other datafeed methods (e.g. process_urls, process, etc.).

prioritynormal
typeenhancement
done in3.20.0
load0.500
load left0.000
closed by#6346f53c85f1 [datafeed] Add a raise_on_error parameter to DataFeedSource.extid2entity
patch[datafeed] Add a raise_on_error parameter to DataFeedSource.extid2entity [applied]