TEST-modin-project#6777: Make to_csv tests on Unidist more stable (modin-project#6776)

Signed-off-by: Anatoly Myachev <anatoly.myachev@intel.com>

Author: anmyachev

.github/workflows/ci.yml

@@ -632,6 +632,15 @@ jobs:
         if: matrix.os != 'windows'
       - run: ${{ matrix.execution.shell-ex }} $PARALLEL modin/numpy/test
       - run: ${{ matrix.execution.shell-ex }} -m "not exclude_in_sanity" modin/pandas/test/test_io.py --verbose
+        if: matrix.execution.name != 'unidist'
+      - uses: nick-fields/retry@v2
+        # to avoid issues with non-stable `to_csv` tests for unidist on MPI backend.
+        # for details see: https://github.com/modin-project/modin/pull/6776
+        with:
+          timeout_minutes: 15
+          max_attempts: 3
+          command: conda run --no-capture-output -n modin_on_unidist ${{ matrix.execution.shell-ex }} -m "not exclude_in_sanity" modin/pandas/test/test_io.py --verbose
+        if: matrix.execution.name == 'unidist'
       - run: ${{ matrix.execution.shell-ex }} modin/experimental/pandas/test/test_io_exp.py
       - run: ${{ matrix.execution.shell-ex }} $PARALLEL modin/test/interchange/dataframe_protocol/test_general.py
       - run: ${{ matrix.execution.shell-ex }} $PARALLEL modin/test/interchange/dataframe_protocol/pandas/test_protocol.py