Fsdk,Fsdk.Tests: enable Misc/Tsv tests on legacy #1579

Job	Run time
macOS--dotnet6-and-mono	14m 22s
macOS--mono	8m 14s
linux-oldLTS-github--dotnet-and-xbuild	6m 56s
linux-oldLTS-github--dotnet-and-msbuild	7m 24s
linux-oldLTS-vanilla--stockmono	1m 51s
linux-oldLTS-vanilla--newmono	1m 56s
linux-newLTS-github--dotnet-and-xbuild	8m 42s
linux-newLTS-github--dotnet-and-msbuild	7m 49s
linux-newLTS-vanilla--dotnet6	8m 38s
linux-newLTS-vanilla--newmono	1m 37s
linux-newLTS-vanilla--stockmono	59s
windows--dotnet6	8m 57s
windows--legacyFramework	10m 26s
sanity-check	0s
publish	0s
	1h 27m 51s

Provide feedback