Do not support 510 with system watchdog on Linux

src/DMAPI/tgs/v5/api.dm

@@ -24,6 +24,9 @@
 
 /datum/tgs_api/v5/New()
 	. = ..()
+#if DM_VERSION < 511
+	TGS_WARNING_LOG("TGS V5 interop does not support the non-basic watchdog on versions prior to 511! Make sure you've configured the basic watchdog in TGS setting or update BYOND!")
+#endif
 	TGS_DEBUG_LOG("V5 API created")
 
 /datum/tgs_api/v5/ApiVersion()

tests/Tgstation.Server.Tests/Live/TestLiveServer.cs

@@ -1120,7 +1120,10 @@ namespace Tgstation.Server.Tests.Live
 						var compatTests = FailFast(
 							instanceTest
 								.RunCompatTests(
-									new Version(510, 1346),
+									// linux 510 has a critical bug where replacing the directory in non-basic watchdogs causes the DreamDaemon cwd to change
+									new PlatformIdentifier().IsWindows || Environment.GetEnvironmentVariable("General__UseBasicWatchdog") == "true"
+										? new Version(510, 1346)
+										: new Version(511, 1385),
 									adminClient.Instances.CreateClient(compatInstance),
 									compatDMPort,
 									compatDDPort,