GTK build with dotnet6+xbuild #2619

Job	Run time
macOS--dotnet6-and-mono	19m 37s
linux22-github--dotnet-and-mono	4m 31s
linux22-github--dotnet-and-newmono	9m 14s
macOS--dotnet6-only	5m 8s
macOS--mono-only	17m 12s
windows--dotnet6-and-legacyFramework	8m 39s
windows--dotnet6-only	6m 7s
windows--legacyFramework-only	15m 20s
linux20-github--dotnet-and-mono	3m 50s
linux20-github--dotnet-and-newmono	8m 27s
linux20-vanilla--newmono-only	11m 58s
linux20-vanilla--stockmono-only	7m 1s
linux22-vanilla--stockdotnet6-and-newmono	6m 44s
linux22-vanilla--stockdotnet6-and-stockmono	5m 37s
linux22-vanilla--newmono-only	11m 40s
linux22-vanilla--stockdotnet6-only	5m 28s
linux22-vanilla--stockmono-only	7m 34s
conventions	1m 47s
snap_pkg	10m 53s
	2h 46m 47s

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