The previous fix (requiring send_to_all_destinations to be present
before marking a file as completed) broke 3 tests that used only
partial step sets and expected "completed":
- test_coverage_polish.py::TestFileQueriesDeduplicationEnabled::
test_deduplication_enabled_adds_check_for_duplicates
- test_file_listing.py::TestFileListingPagination::
test_processing_status_included
- test_file_listing.py::TestFileDetailEndpoint::
test_file_detail_status_determination
Add send_to_all_destinations: success to each test's dataset so
"completed" status is reached correctly under the new semantics.
Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>