[datafeed] Add a raise_on_error parameter to DataFeedSource.extid2entity
And pass the option from various `process_` methods in existing parsers.
This makes debugging in tests easier.
Closes #4601191.
Upstream Author:
%(author)s <%(author-email)s>
Copyright:
Copyright (c) %(year)s %(author)s.
%(author-web-site)s -- mailto:%(author-email)s