Specify Python3 executable path in CI (#11696)

diff --git a/build_tools/cmake/build_e2e_test_artifacts.sh b/build_tools/cmake/build_e2e_test_artifacts.sh
index 5a8031c..9a37527 100755
--- a/build_tools/cmake/build_e2e_test_artifacts.sh
+++ b/build_tools/cmake/build_e2e_test_artifacts.sh
@@ -33,6 +33,8 @@
 echo "Configuring to build e2e test artifacts"
 "${CMAKE_BIN}" -B "${BUILD_DIR}" \
   -G Ninja \
+  -DPython3_EXECUTABLE="${IREE_PYTHON3_EXECUTABLE}" \
+  -DPYTHON_EXECUTABLE="${IREE_PYTHON3_EXECUTABLE}" \
   -DIREE_HOST_BINARY_ROOT="${IREE_HOST_BINARY_ROOT}" \
   -DIREE_BUILD_EXPERIMENTAL_E2E_TEST_ARTIFACTS=ON \
   -DIREE_BUILD_COMPILER=OFF \