Regression of `config` command arguments to string (should be array)

[mokibit]

Describe the bug
PR #1504, which fixed variable interpolation in unquoted values (command and entrypoint), introduced a regression in how podman-compose config handles the type of command arguments.

To Reproduce
docker-compose.yml:

services:
  test:
    image: busybox
    command: sleep infinity

Run command podman-compose config

Expected behavior

services:
  test:
    command:
    - sleep
    - infinity
    image: busybox

Actual behavior

services:
  test:
    command: sleep infinity
    image: busybox

Environment:
Debian GNU/Linux 13 (trixie)
Python 3.13.5
podman-compose version 1.6.0
podman version 5.4.2

Additional context
podman-compose should keep command arguments as an array and behave the same as docker-compose does:

$ docker-compose config
name: test-podman-compose
services:
  test:
    command:
      - sleep
      - infinity
    image: busybox
    networks:
      default: null
networks:
  default:
    name: test-podman-compose_default