Remove sklearn example xfails

ci/test_python_sklearn_examples.sh

@@ -9,6 +9,13 @@ cd "$(dirname "$(realpath "${BASH_SOURCE[0]}")")"/../ || exit 1
 export DEPENDENCY_FILE_KEY=test_python_accel_sklearn
 source ./ci/test_python_common.sh
 
+rapids-logger "Install optional scikit-learn example dependencies"
+rapids-mamba-retry install --yes -n test \
+    "plotly>=6,<7" \
+    "polars>=1,<2" \
+    "pooch>=1,<2" \
+    scikit-image
+
 EXITCODE=0
 trap "EXITCODE=1" ERR
 set +e
@@ -18,15 +25,17 @@ SKLEARN_EXAMPLES_JUNITXML="${RAPIDS_TESTS_DIR}/junit-sklearn-examples.xml"
 # Run scikit-learn examples under cuml.accel
 rapids-logger "scikit-learn examples"
 timeout -v --signal=SIGINT --kill-after=60s 60m ./python/cuml/cuml_accel_tests/upstream/scikit-learn/run-examples.sh \
+    -vv --durations=0 --durations-min=0 \
     -n 4 --dist worksteal \
+    --example-timeout=300 \
     --junitxml="${SKLEARN_EXAMPLES_JUNITXML}"
 
-# The examples tests tolerate timeouts and network issues (warn-only), but
-# require a healthy majority of examples to pass so widespread regressions are
-# not missed.
-rapids-logger "scikit-learn examples: require >=50% pass rate"
+# Per-example timeouts and network failures are reported as xfails. The
+# examples tests still require a healthy majority of examples to pass so
+# widespread regressions are not missed.
+rapids-logger "scikit-learn examples: require >=90% pass rate"
 ./python/cuml/cuml_accel_tests/upstream/summarize-results.py \
-    --fail-below 50 \
+    --fail-below 90 \
     "${SKLEARN_EXAMPLES_JUNITXML}"
 
 rapids-logger "Test script exiting with value: $EXITCODE"