optimize installation and instruction of clang-format (#43248)

tools/codestyle/clang_format.hook

@@ -5,7 +5,15 @@ readonly VERSION="13.0.0"
 
 version=$(clang-format -version)
 
+if ! [[ $(python -V 2>&1 | awk '{print $2}' | awk -F '.' '{print $1$2}') -ge 36 ]]; then
+    echo "clang-format installation by pip need python version great equal 3.6, 
+          please change the default python to higher version."
+    exit 1
+fi
+
 if ! [[ $version == *"$VERSION"* ]]; then
+    # low version of pip may not have the source of clang-format whl
+    pip install --upgrade pip 
     pip install clang-format==13.0.0
 fi