GTK build with dotnet6+xbuild #2585

Job	Run time
linux20-github--dotnet-and-newmono	4m 37s
linux20-vanilla--newmono-only	12m 23s
linux20-github--dotnet-and-mono	4m 15s
linux20-vanilla--stockmono-only	7m 11s
linux22-github--dotnet-and-mono	4m 33s
linux22-github--dotnet-and-newmono	4m 28s
linux22-vanilla--newmono-only	6h 0m 2s
linux22-vanilla--stockdotnet6-and-newmono	6m 32s
linux22-vanilla--stockdotnet6-and-stockmono	7m 14s
linux22-vanilla--stockdotnet6-only	5m 29s
linux22-vanilla--stockmono-only	7m 3s
macOS--dotnet6-and-mono	8m 14s
macOS--dotnet6-only	6m 18s
macOS--mono-only	18m 33s
windows--dotnet6-and-legacyFramework	11m 31s
windows--dotnet6-only	8m 35s
windows--legacyFramework-only	6m 55s
conventions	0s
snap_pkg	0s
	8h 3m 53s

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