Changes to support sharrow on 2-zone model #784

Job	Run time
linux-64-py3.10	5m 37s
macOS	8m 19s
Standard 1-Zone Example (MTC)	4m 4s
win-64	11m 6s
Standard 2-Zone Example (SANDAG)	1h 1m 39s
estimation_mode_test	16m 15s
prototype_mtc	45m 30s
random_seed_generation_test	2m 36s
develop-docbuild	0s
placeholder_psrc	35m 2s
prototype_marin	1m 37s
prototype_mtc_extended	2h 13m 20s
placeholder_sandag	2h 1m 19s
prototype_sandag_xborder	4m 9s
production_semcog	5m 2s
prototype_mwcog	46m 41s
placeholder_multiple_zone	8m 0s
	8h 30m 16s

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