Add logsumexp and comb to utils.fixes (#9046)

sklearn/decomposition/online_lda.py

sklearn/ensemble/gradient_boosting.py

sklearn/ensemble/tests/test_forest.py

sklearn/linear_model/logistic.py

sklearn/linear_model/tests/test_sag.py

sklearn/metrics/cluster/supervised.py

sklearn/mixture/base.py

sklearn/mixture/dpgmm.py

sklearn/mixture/gmm.py

sklearn/model_selection/_split.py

sklearn/model_selection/tests/test_split.py

sklearn/naive_bayes.py

sklearn/utils/extmath.py

sklearn/utils/fixes.py

sklearn/utils/tests/test_random.py