[ci] Add shell tag to cppcheck and ruff jobs.

scripts/ci/jobs/code-quality.yml

 cppcheck:
   stage: check
   needs: [meta]
-  tags: [envinf]
+  tags: [envinf, shell]
   before_script:
     - mkdir -p build
     - cd build
@@ -19,7 +19,7 @@ cppcheck:
 ruff:
   stage: check
   needs: []
-  tags: [envinf]
+  tags: [envinf, shell]
   script:
     - pipx run ruff check --exit-zero .
     - pipx run ruff check --exit-zero --output-format gitlab . > ruff-report.json