Fixed simultaneous pulses with indexing of segments on looping parameter

CHANGELOG.md

pulse_lib/segments/data_classes/data_HVI_variables.py

pulse_lib/segments/data_classes/data_acquisition.py

pulse_lib/segments/data_classes/data_generic.py

pulse_lib/segments/data_classes/data_markers.py

pulse_lib/segments/data_classes/data_pulse.py

pulse_lib/segments/segment_acquisition.py

pulse_lib/segments/segment_base.py

pulse_lib/segments/segment_container.py

pulse_lib/segments/utility/looping.py

pulse_lib/sequence_builder.py