Plot horizon distance from ranking statistics

This MR will change the horizon distance plotting program in the DAG: instead of creating one horizon distance plot from reference PSDs, the new program create the horizon distance from the ranking statistic for each template bank bin. The main changes that affect the DAG workflow are summarized below:

• gstlal_inspiral_pipe: change plotting program from gstlal_plot_psd_horizon to gstlal_inspiral_plot_rankingstats_horizon (previously called gstlal_inspiral_plot_psd_horizon which does not accurately describe what it actually does, also see miscellaneous changes below).
• inspiral.py: update the horizon_dist_layer for the new plotting program.
• gstlal_inspiral_summary_page: horizon distances plots are put inside a new UI component (report.ImagePagination) so that all the plots will not be fetched at the same time and can be paginated.
• make the above changes to new style DAG workflow as well.

Miscellaneous changes:

• add new plotting module called horizon.py
• update the gstlal_plot_psd_horizon to use horizon.py module,
• renamed gstlal_inspiral_plot_psd_horizon --> gstlal_inspiral_plot_rankingstats_horizon

Note: this MR depends on gstlal-visualisation/ligo-scald!36 (merged), it's better not to merged before that request has been merged.

gstlal/bin/gstlal_play

@@ -21,16 +21,13 @@ from optparse import OptionParser
 import sys
 
 import lal
-
+from ligo.lw import lsctables, ligolw
 from ligo.lw import utils as ligolw_utils
+from ligo.lw.utils import segments as ligolw_segments
+
 from gstlal import datasource
-from gstlal import multirate_datasource
-from gstlal import pipeparts
-from gstlal import simplehandler
 from gstlal.psd import read_psd
 from gstlal.stream import Stream
-from ligo.lw.utils import segments as ligolw_segments
-from ligo.lw import lsctables, ligolw
 
 ### This program will play data in a variety of ways
 ###
@@ -211,16 +208,16 @@ elif options.low_pass_filter is not None:
 # necessary audio convert and amplify 
 stream = stream.audioamplify(options.amplification).audioconvert()
 if options.sample_format is not None:
-	stream.stream.capsfilter(f"audio/x-raw, format={options.sample_format}")
+	stream = stream.capsfilter(f"audio/x-raw, format={options.sample_format}")
 
 if options.output is None:
 	stream.autoaudiosink()
 elif options.output.endswith(".wav"):
-	stream.wavenc().filefink(options.output)
+	stream.wavenc().filesink(options.output)
 elif options.output.endswith(".flac"):
-	stream.flacenc().filefink(options.output)
+	stream.flacenc().filesink(options.output)
 elif options.output.endswith(".ogg"):
-	stream.vorbisenc().oggmux().filefink(options.output)
+	stream.vorbisenc().oggmux().filesink(options.output)
 elif options.output.endswith(".txt") or options.output in ("/dev/stdout", "/dev/stderr"):
 	stream.nxydumpsink(options.output)
 else: