[tfjs-data] Fix test files list missing setup_tests.ts (#6482)
[tfjs-data] Fix test files list missing setup_tests.ts (#6482)

This caused setup_tests.ts to be included in the non-test ts_library of tfjs-data, which would sometimes cause compilation to fail.

Co-authored-by: Ping Yu <e3982a96662cc73e971d68f6aafe25f9d2e93e85@users.noreply.github.com>
tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs