Fixes ai shell deployment not unregistering a death signal properly #645

Job	Run time
Collect data for other tasks	21s
Run Linters	2m 42s
Compile Maps	5m 30s
Windows Build	3m 55s
Integration Tests (birdshot) / run_integration_tests	13m 59s
Integration Tests (deltastation) / run_integration_tests	15m 2s
Integration Tests (gateway_test) / run_integration_tests	18m 27s
Integration Tests (icebox) / run_integration_tests	15m 3s
Integration Tests (kilostation2) / run_integration_tests	16m 57s
Integration Tests (metastation) / run_integration_tests	16m 21s
Integration Tests (multiz_debug) / run_integration_tests	13m 29s
Integration Tests (northstar) / run_integration_tests	15m 23s
Integration Tests (nssjourney) / run_integration_tests	14m 11s
Integration Tests (runtimestation) / run_integration_tests	16m 13s
Integration Tests (tramstation) / run_integration_tests	14m 31s
Integration Tests (voidraptor) / run_integration_tests	14m 56s
Alternate Tests (515, 1603, runtimestation) / run_integration_tests	11m 10s
Check Alternate Tests	3s
Compare Screenshot Tests	1m 44s
	3h 29m 57s

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