Replace custom action by shell script

tools/run_pylint.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+SUCCESS=0
+
+# Ensure we are at the project root directory
+cd $(readlink -f $(dirname $0))/..
+
+for file in `find . ! -path "./third_party/*" -type f -name '*.py'`
+do
+  # Output header for our custom matcher on Github workflow
+  echo "PYLINT:${file}"
+  if ! pylint --rcfile=.pylintrc --score=n "$file"
+  then
+    SUCCESS=1
+  fi
+done
+
+exit $SUCCESS