TEST-#2026: speed up test_join_sort.py (#2027)
TEST-#2026: speed up test_join_sort.py (#2027)

* TEST-#2026: speed up test_join_sort.py

Signed-off-by: Anatoly Myachev <891778d0bbe2d9c0eda4a6dbde77616e7f335abb@intel.com>

* TEST-#2026: Update modin/pandas/test/dataframe/test_join_sort.py

Co-authored-by: Dmitry Chigarev <c800ca340162d691fac8d6798673ae2203938c22@users.noreply.github.com>

Signed-off-by: Anatoly Myachev <891778d0bbe2d9c0eda4a6dbde77616e7f335abb@intel.com>
modin-project/modin,modin-project/modin