[MIRROR] Slime type datum, and cleans up slime related code #2066

Job	Run time
Collect data for other tasks	14s
Run Linters	2m 2s
Compile Maps	5m 17s
Windows Build	2m 38s
Integration Tests (deltastation) / run_integration_tests	12m 2s
Integration Tests (birdshot) / run_integration_tests	11m 38s
Integration Tests (blueshift) / run_integration_tests	12m 32s
Integration Tests (gateway_test) / run_integration_tests	13m 34s
Integration Tests (icebox) / run_integration_tests	12m 19s
Integration Tests (kilostation2) / run_integration_tests	11m 48s
Integration Tests (metastation) / run_integration_tests	11m 22s
Integration Tests (multiz_debug) / run_integration_tests	11m 4s
Integration Tests (northstar) / run_integration_tests	12m 39s
Integration Tests (nssjourney) / run_integration_tests	13m 40s
Integration Tests (runtimestation) / run_integration_tests	10m 58s
Integration Tests (tramstation) / run_integration_tests	12m 30s
Integration Tests (voidraptor) / run_integration_tests	12m 19s
Alternate Tests (515, 1603, runtimestation) / run_integration_tests	10m 2s
Check Alternate Tests	1s
Compare Screenshot Tests	3m 42s
	3h 2m 21s

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