Tests not running on the CI

[allanrenucci]

The following tests are not run by the CI:

dotty.ShowTests
dotty.tools.dottydoc.CommentCleanerTest
dotty.tools.dottydoc.Constructors
dotty.tools.dottydoc.JavaConverterTest
dotty.tools.dottydoc.MarkdownTests
dotty.tools.dottydoc.PackageStructure
dotty.tools.dottydoc.TestSimpleComments
dotty.tools.dottydoc.TestWhitelistedCollections
dotty.tools.dottydoc.UsecaseTest
dotty.tools.dottydoc.staticsite.PageTests
dotty.tools.dottydoc.staticsite.SiteTests
dotty.tools.dottydoc.staticsite.TemplateErrorTests
xsbt.DependencySpecification
xsbt.ExtractAPISpecification
xsbt.ExtractUsedNamesSpecification