Add a fallback timer to ensure smoke doesn't far outlive its intended lifetime #12356

Job	Run time
Start Gate	1s
Run Linters	2m 17s
Collect data for other tasks	13s
Windows Build	1m 55s
Compile Maps	2m 32s
Integration Tests (blueshift) / run_integration_tests	17m 34s
Integration Tests (boxstation) / run_integration_tests	13m 46s
Integration Tests (deltastation) / run_integration_tests	14m 20s
Integration Tests (icebox) / run_integration_tests	13m 28s
Integration Tests (kilostation) / run_integration_tests	13m 1s
Integration Tests (multiz_debug) / run_integration_tests	12m 49s
Integration Tests (ouroboros) / run_integration_tests	17m 54s
Integration Tests (metastation) / run_integration_tests	13m 51s
Integration Tests (runtimestation) / run_integration_tests	11m 57s
Integration Tests (theseus) / run_integration_tests	19m 19s
Integration Tests (voidraptor) / run_integration_tests	13m 42s
Integration Tests (tramstation) / run_integration_tests	13m 18s
Alternate Tests (515, 1627, runtimestation) / run_integration_tests	11m 30s
Compare Screenshot Tests	23s
Completion Gate	3s
	3h 13m 53s

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