Refactor: consolidate workflow, use explicit version constraint

Refactor: consolidate workflow, use explicit version constraint This commit consolidates the Docker build and test workflow into a single file (`docker-buildx.yml`), removing the redundant `test-drupal.yml`. It also improves the Drupal installation script to be more robust and explicitly accept version constraints. Key changes: - `docker-buildx.yml`: - Merged test steps from `test-drupal.yml`. - Passes explicit Drupal version constraints (`^10` for PHP 8.2, `^11` for others) to the install script. - Cleans `drupal-root` before starting containers. - `tests/install-drupal.sh`: - Removed `HAS_COMPOSER` check; the script now assumes a clean state and unconditionally creates the project. - Accepts the version constraint directly as the second argument (e.g., `^10`), removing internal parsing logic. - Uses `rm -rf` to ensure the directory is clean before `composer create-project`. - `php8/apache-bookworm/Dockerfile`: - Added `SQLITE_ENABLE_COLUMN_METADATA=1` to `CPPFLAGS` to fix Drupal compatibility with the custom SQLite build. This ensures a reliable "Build -> Test -> Push" pipeline where the push only happens if tests pass. Co-authored-by: hussainweb <1040271+hussainweb@users.noreply.github.com>