Minor rework to how toxic chemicals work #48379

Job	Run time
Compile All Maps	1m 15s
Lints	1m 36s
Find Maps to Test	16s
Lint with OpenDream	36s
Compile and Run Tests (gaxstation)	4m 37s
Compile and Run Tests (icemeta)	7m 25s
Compile and Run Tests (manateestation)	5m 24s
Compile and Run Tests (donutstation)	4m 57s
Compile and Run Tests (ministation)	4m 57s
Compile and Run Tests (multiz_debug)	4m 34s
Compile and Run Tests (runtimestation)	4m 34s
Compile and Run Tests (yogstation)	6m 41s
Final Map Test	1s
	46m 53s

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