Report the annotation indices or line numbers on import failures in YOLO formats

[zhiltsov-max]

It would be nice to report the annotation or line numbers in

datumaro/src/datumaro/plugins/yolo_format/extractor.py

Lines 287 to 293 in 1175180

	for line in lines:
	try:
	annotations.append(
	self._load_one_annotation(line.split(), image_height, image_width)
	)
	except Exception as e:
	self._ctx.error_policy.report_annotation_error(e, item_id=item_id)

to simplify troubleshooting for users. Currently only item id and the specific import problem is being reported.

Originally posted by @zhiltsov-max in #70 (comment)