feat: switch to php-parallel-lint for linting

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

includes/tests/lint.yml

@@ -6,17 +6,16 @@
     - composer config gitlab-token.gitlab.wpdesk.dev gitlab-ci-token ${CI_JOB_TOKEN}
     - composer install --no-dev
     - rm auth.json
+    - phive install -g https://github.com/php-parallel-lint/PHP-Parallel-Lint/releases/download/v1.4.0/parallel-lint.phar --force-accept-unsigned
   script:
-    - |
-      set -x; \
-      LINT="$(find . -name '*.php' -print0 |xargs -n1 -0 -P16 php -l 2>&1)"; \
-      RESULT="$?"; \
-      if [[ "$RESULT" -ne 0 ]]; then
-        echo -e "$LINT" | grep -v 'No syntax errors';
-        exit 0;
-      else
-        exit "$RESULT"
-      fi
+    - parallel-lint . --gitlab > lint-codequality.json || true
+    - parallel-lint .
+  artifacts:
+    paths:
+      - lint-codequality.json
+    expire_in: 1 week
+    reports:
+      codequality: lint-codequality.json
 
 lint:8.3:
   extends: .lint