Fix: simplify Drupal download using docker compose exec

Fix: simplify Drupal download using docker compose exec This commit simplifies the workflow by running the Drupal download step inside the running container using `docker compose exec` instead of running a separate `docker run` command before bringing up the stack. This addresses feedback from the PR review and maintains the PHP version compatibility fix. - Updates the "Download Drupal" step in `docker-buildx.yml` to run *after* `Start Docker containers`. - Uses `docker compose exec` to run `composer create-project`. - Maintains the conditional logic to install Drupal 10 for PHP 8.2. Previous fixes included in this PR: - Enable `SQLITE_ENABLE_COLUMN_METADATA` for apache-bookworm builds. - Consolidate testing logic into the main build workflow. - Ensure dependency resolution matches the target container environment. Co-authored-by: hussainweb <1040271+hussainweb@users.noreply.github.com>