Add SGX_LOG_LEVEL to bigdl_ppml_trusted_python_toolkit. (#6557)

* Add SGX_LOG_LEVEL to bigdl_ppml_trusted_python_toolkit.

.github/workflows/manually_build_for_testing.yml

@@ -630,6 +630,7 @@ jobs:
           --build-arg https_proxy=${HTTPS_PROXY} \
           --build-arg BASE_IMAGE_NAME=${base_image} \
           --build-arg SGX_MEM_SIZE=64G \
+          --build-arg SGX_LEVEL_LOG=error \
           --build-arg BASE_IMAGE_TAG=${TAG} \
           -t ${image}:${TAG} -f ./Dockerfile .
         sudo docker push ${image}:${TAG}