Backend.*: fix assembly version attribs #2947

Job	Run time
macOS--dotnet6-only	4m 56s
macOS--dotnet6-only	4m 56s
macOS--mono-only	5m 16s
macOS--mono-only	5m 16s
linux22-github--dotnet-and-newmono	3m 53s
linux22-github--dotnet-and-newmono	3m 53s
linux22-github--dotnet-and-mono	3m 58s
linux22-github--dotnet-and-mono	3m 58s
macOS--dotnet6-and-mono	4m 41s
macOS--dotnet6-and-mono	4m 41s
windows--dotnet6-and-legacyFramework	5m 25s
windows--dotnet6-and-legacyFramework	5m 25s
windows--dotnet6-only	6m 19s
windows--dotnet6-only	6m 19s
windows--legacyFramework-only	12m 16s
windows--legacyFramework-only	12m 16s
linux20-github--dotnet-and-mono	3m 41s
linux20-github--dotnet-and-mono	3m 41s
linux22-vanilla--stockdotnet6-and-newmono	5m 28s
linux22-vanilla--stockdotnet6-and-newmono	5m 28s
linux22-vanilla--stockdotnet6-and-stockmono	4m 42s
linux22-vanilla--stockdotnet6-and-stockmono	4m 42s
linux22-vanilla--stockdotnet6-only	4m 50s
linux22-vanilla--stockdotnet6-only	4m 50s
linux22-vanilla--stockmono-only	1m 12s
linux22-vanilla--stockmono-only	5m 5s
linux20-github--dotnet-and-newmono	3m 32s
linux20-github--dotnet-and-newmono	3m 32s
linux20-vanilla--newmono-only	5m 54s
linux20-vanilla--newmono-only	5m 54s
linux20-vanilla--stockmono-only	4m 49s
linux20-vanilla--stockmono-only	4m 49s
linux22-vanilla--newmono-only	5m 54s
linux22-vanilla--newmono-only	5m 54s
conventions	0s
conventions	1m 4s
snap_pkg	0s
snap_pkg	4m 34s
	3h 3m 3s

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