[BUG] Stress test failures for 0.16

[Nanthini10]

Describe the bug
Stress test failures and stack traces.

Still in progress, will be updating.

FAILED test_fil.py::test_fil_classification[90-1000-500000] - assert False
FAILED test_fil.py::test_fil_regression[11-90-1000-500000] - assert False

FAILED test_nearest_neighbors.py::test_knn_separate_index_search[braycurtis-50-1000-500000-dataframe]  
FAILED test_nearest_neighbors.py::test_knn_separate_index_search[braycurtis-50-1000-500000-ndarray] 


FAILED dask/test_kmeans.py::test_score[dataframe-50-50-30-5000000.0]
FAILED dask/test_kmeans.py::test_score[array-50-50-10-5000000.0] 


# PR in progress for this error see below
FAILED dask/test_tsvd.py::test_pca_fit[dataframe-data_info1] - TypeError: object o...
FAILED dask/test_tsvd.py::test_pca_fit[array-data_info1] - TypeError: object of ty...
FAILED dask/test_tsvd.py::test_pca_fit_transform_fp32[data_info1] - TypeError: obj...
FAILED dask/test_tsvd.py::test_pca_fit_transform_fp64[data_info1] - TypeError: obj...

stack_trace_fil.txt
stack_trace_dask_tsvd.txt
test_knn_separate_index_search.txt
dask_kmeans_test_score.txt

Related issues -
nearest_neighbors failure - #2961
dask/test_kmeans - #2969

Related PRs -
dask/test_tsvd.py test Fix - #2941

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[lowener]

The stress tests of test_fil.py and test_nearest_neighbors.py listed here are still failing as of v0.18.

[lowener]

As of v0.19 some tests are still failling:
test_fil.py::test_fil_regression[11-90-1000-500000]
test_nearest_neighbors.py::test_knn_separate_index_search[braycurtis-50-1000-70000-dataframe]
test_nearest_neighbors.py::test_knn_separate_index_search[braycurtis-50-1000-70000-ndarray]