Move `scala2-library-tasty-tests/run` tests to `tests/run/scala2-library-test`#19383

bishabosha merged 1 commit intoscala:mainscala/scala3:mainfrom

dotty-staging:simplify-scala2-library-tasty-testsdotty-staging/dotty:simplify-scala2-library-tasty-testsCopy head branch name to clipboard