CI: respect DRY wrt fsxc version #3966

Job	Run time
windows--dotnet6-and-legacyFramework	6m 17s
macOS--dotnet6-only	8m 3s
linux-github--dotnet-and-newmono	7m 29s
linux-github--dotnet-and-mono	4m 12s
macOS--dotnet6-and-mono	17m 8s
macOS--mono-only	11m 9s
windows--dotnet6-only	6m 25s
windows--legacyFramework-only	12m 43s
linux-vanilla--newmono-only	8m 45s
linux-vanilla--stockdotnet6-and-newmono	6m 19s
linux-vanilla--stockdotnet6-and-stockmono	6m 48s
linux-vanilla--stockdotnet6-only	5m 19s
linux-vanilla--stockmono-only	6m 30s
conventions	1m 14s
snap_pkg_beta	7m 38s
snap_pkg	7m 20s
	2h 3m 19s

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