scripts,GitHubCI: remove curl as a dependency #2575

Job	Run time
linux20-vanilla--newmono-only	11m 56s
linux20-vanilla--stockmono-only	49s
linux20-github--dotnet-and-newmono	5m 2s
linux20-github--dotnet-and-mono	4m 0s
linux22-github--dotnet-and-mono	4m 4s
linux22-github--dotnet-and-newmono	5m 13s
linux22-vanilla--newmono-only	9m 38s
linux22-vanilla--stockdotnet6-and-newmono	6m 21s
linux22-vanilla--stockdotnet6-and-stockmono	6m 32s
linux22-vanilla--stockdotnet6-only	6m 6s
linux22-vanilla--stockmono-only	50s
macOS--dotnet6-and-mono	7m 3s
macOS--dotnet6-only	5m 42s
macOS--mono-only	19m 33s
windows--dotnet6-and-legacyFramework	6m 46s
windows--dotnet6-only	8m 16s
windows--legacyFramework-only	18m 5s
conventions	0s
snap_pkg	0s
	2h 5m 56s

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