Changes to support sharrow on 2-zone model #755

Job	Run time
linux-64-py3.10	4m 55s
random_seed_generation_test	2m 20s
prototype_mtc	42m 16s
macOS	8m 7s
prototype_psrc_in_development	3m 34s
prototype_mtc	41m 54s
win-64	9m 18s
estimation_mode_test	16m 5s
placeholder_psrc	34m 43s
prototype_marin	1m 26s
prototype_mtc_extended	2h 16m 2s
develop-docbuild	0s
placeholder_sandag	1h 57m 12s
prototype_sandag_xborder	4m 8s
production_semcog	4m 58s
prototype_mwcog	43m 38s
placeholder_multiple_zone	7m 29s
	7h 58m 5s

Provide feedback