fix(estimation): correct the participant_num assignment logic for estimation mode in joint tour participation #1054

Job	Run time
linux-64-py	5m 46s
win-64	9m 41s
estimation_edb_creation_test	7m 4s
Expression Profiling Tests	7m 53s
macOS	5m 56s
Standard 1-Zone Example (MTC)	53m 24s
prototype_mtc	53m 20s
Standard 2-Zone Example (SANDAG)	2h 9m 4s
production_semcog	6m 26s
prototype_marin	2m 24s
prototype_mtc_extended	1h 26m 46s
Estimation Mode Unit Tests	24m 37s
Estimation Notebooks Test	48m 0s
prototype_mwcog	58m 7s
prototype_sandag_xborder	5m 52s
placeholder_psrc	55m 23s
random_seed_generation_test	3m 25s
placeholder_multiple_zone	10m 41s
develop-docbuild	0s
linux-64-py	5m 46s
Standard 2-Zone Example (SANDAG)	1h 36m 34s
macOS	5m 56s
prototype_mtc_extended	1h 26m 46s
develop-docbuild	-157619s
Expression Profiling Tests	7m 53s
prototype_sandag_xborder	5m 52s
estimation_edb_creation_test	7m 4s
Standard 1-Zone Example (MTC)	53m 24s
Estimation Notebooks Test	48m 0s
prototype_marin	2m 24s
random_seed_generation_test	3m 25s
prototype_mtc	53m 20s
Estimation Mode Unit Tests	24m 37s
win-64	9m 41s
placeholder_multiple_zone	10m 41s
placeholder_psrc	55m 23s
prototype_mwcog	58m 7s
production_semcog	6m 26s
	-90711s

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