Add GHA problem-matcher for pylint

GitHub [Problem
Matchers](https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md)
are a mechanism that enable workflow steps to scan the outputs of
GitHub Actions for regex patterns and automatically write annotations
in the workflow summary page. Using Problem Matchers allows
information to be displayed more prominently in the GitHub user
interface.

This hooks in the problem matcher for Pylint.

.github/workflows/ci.yml

@@ -228,6 +228,9 @@ jobs:
       - name: Install requirements
         run: pip install -r dev_tools/requirements/envs/pylint.env.txt
 
+      - name: Set up Pylint output problem matcher
+        run: echo '::add-matcher::.github/problem-matchers/pylint.json'
+
       - name: Run pylint
         run: check/pylint
 
@@ -390,7 +393,6 @@ jobs:
 
       - name: Set up yamllint output problem matcher
         run: |
-          ls -la
           echo "::add-matcher::.github/problem-matchers/yamllint.json"
 
       - name: Run yamllint