Support for R1v1 / EVBv6 volume-reduced data

[moralejo]

Add support for reading files with DVR applied (currently needed for LST)

ctapipe_io_lst/src/ctapipe_io_lst/__init__.py

Lines 476 to 483 in 3a4deee

	def fill_from_cta_r1(self, array_event, zfits_event):
	tel_id = self.tel_id
	scale = self.data_stream.waveform_scale
	offset = self.data_stream.waveform_offset
	pixel_id_map = self.camera_config.pixel_id_map
	# FIXME: missing modules / pixels
	# FIXME: DVR? should not happen in r1 but dl0, but our own converter uses the old R1