ci: pull phpfpm and its dependencies up front in workflow templates

[turegjorup]

Pull the phpfpm service and its dependencies up front with docker compose pull --quiet --include-deps phpfpm, so the images download in parallel before the job runs instead of lazily during docker compose run.

Changes

• Add a "Pull container images" step to the workflow templates whose jobs run in phpfpm:
  • github/workflows/composer.yaml (validate, normalize, audit)
  • github/workflows/twig.yaml
  • github/workflows/drupal/php.yaml
  • github/workflows/drupal-module/php.yaml
  • github/workflows/symfony/php.yaml

Why

phpfpm declares depends_on: mariadb (and memcached for Drupal), so docker compose run --rm phpfpm … brings up several services. Pulling with --include-deps up front fetches those images in parallel before the run, for faster and cleaner jobs.

Notes

• Only applied where it helps. The Prettier/markdownlint workflows (YAML, Markdown, JavaScript, Styles) run a single dependency-less image, so an up-front pull would add nothing over the pull run already does — left unchanged.
• github/workflows/drupal/site.yaml already pulls the full stack up front (docker compose pull) and is unchanged.
• Mirrors the up-front pull strategy adopted in ci: cache vendor, pre-pull images, drop Task from Review workflow event-database-imports#98.