Enabled org.scalatest.fixture tests under dotty-js build.
Enabled org.scalatest.fixture tests under dotty-js build.

dotty-staging/scalatest,scalatest/scalatest,cheeseng/scalatest,dotty-staging/scalatest,cheeseng/scalatest,dotty-staging/scalatest,cheeseng/scalatest,scalatest/scalatest,scalatest/scalatest