ci: install and enable pcov in tests_laravel job for code coverage

.gitlab-ci.yml

@@ -97,7 +97,6 @@ tests_laravel:
   image: composer:2.10
   allow_failure: false
   variables:
-    XDEBUG_MODE: coverage
     COMPOSER_CACHE_DIR: ".composer-cache"
   cache:
     - key:
@@ -109,6 +108,7 @@ tests_laravel:
         - .composer-cache/
         - vendor/
   before_script:
+    - apk add --no-cache $PHPIZE_DEPS linux-headers && pecl install pcov && docker-php-ext-enable pcov
     - composer config gitlab-token.lab.s-web.fr "${CI_DEPLOY_USER}" "${CI_DEPLOY_PASSWORD}"
     - composer install --no-interaction --prefer-dist --optimize-autoloader --no-scripts
   script: