Faction datums for smarter faction logic (#3156) #18663

Job	Run time
Compile Maps	44s
Run Linters	3m 12s
Windows Build	2m 47s
Integration Tests (BASIC_TESTS) / run_integration_tests	3m 11s
Integration Tests (CREATE_AND_DESTROY_TEST) / run_integration_tests	2m 36s
Integration Tests (PLANET_GEN_TEST) / run_integration_tests	4m 36s
Integration Tests (RUIN_PLACEMENT_TEST) / run_integration_tests	4m 6s
Integration Tests (SHIP_PLACEMENT_TEST) / run_integration_tests	9m 58s
	31m 10s

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