Add a config that allows for overriding ruin template variables #7149

Job	Run time
Run Linters	2m 24s
Collect data for other tasks	15s
Lint with OpenDream	29s
Compile Maps	2m 10s
Windows Build	2m 8s
Integration Tests (boxstation) / run_integration_tests	7m 31s
Integration Tests (deltastation) / run_integration_tests	7m 5s
Integration Tests (icebox) / run_integration_tests	12m 2s
Integration Tests (kilostation) / run_integration_tests	7m 0s
Integration Tests (metastation) / run_integration_tests	7m 35s
Integration Tests (multiz_debug) / run_integration_tests	6m 30s
Integration Tests (northstar) / run_integration_tests	8m 27s
Integration Tests (runtimestation) / run_integration_tests	6m 24s
Integration Tests (tramstation) / run_integration_tests	7m 29s
Alternate Tests (515, 1627, runtimestation) / run_integration_tests	6m 52s
Check Alternate Tests	1s
Compare Screenshot Tests	3m 5s
	1h 27m 27s

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