Adds additional config checks for antag opt-in system (#2024) (#2948) #6492

Job	Run time
Lint with OpenDream	36s
Collect data for other tasks	15s
Run Linters	2m 59s
Compile Maps	4m 20s
Windows Build	1m 54s
Integration Tests (birdshot) / run_integration_tests	11m 4s
Integration Tests (blueshift) / run_integration_tests	12m 2s
Integration Tests (deltastation) / run_integration_tests	11m 24s
Integration Tests (gateway_test) / run_integration_tests	12m 29s
Integration Tests (icebox) / run_integration_tests	11m 44s
Integration Tests (kilostation2) / run_integration_tests	11m 31s
Integration Tests (metastation) / run_integration_tests	11m 7s
Integration Tests (multiz_debug) / run_integration_tests	10m 33s
Integration Tests (northstar) / run_integration_tests	12m 22s
Integration Tests (ouroboros) / run_integration_tests	11m 51s
Integration Tests (nssjourney) / run_integration_tests	11m 1s
Integration Tests (runtimestation) / run_integration_tests	10m 14s
Integration Tests (tramstation) / run_integration_tests	11m 34s
Integration Tests (voidraptor) / run_integration_tests	11m 42s
Alternate Tests (515, 1627, runtimestation) / run_integration_tests	10m 20s
Check Alternate Tests	1s
Compare Screenshot Tests	19s
	3h 1m 22s

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