Override fails when using reset to clear depends_on parameter

[Are10]

Describe the bug
I am trying to remove a service using an override file.
Clearing an entire service works fine, using !reset null, but removing the associated depends_on parameter fails.

Using the feature recently added in #1189

To Reproduce
Steps to reproduce the behavior:

0. Setup:

apt-get install podman python3-dotenv
mkdir -p .local/bin
curl -o ~/.local/bin/podman-compose https://raw.githubusercontent.com/containers/podman-compose/main/podman_compose.py
chmod +x .local/bin/podman-compose
export PODMAN_COMPOSE_PROVIDER='/root/.local/bin/podman-compose'

1. Create a compose and an override file

version: "3.7"
services:
  frontend:
    image: busybox
    depends_on:
      - db
    command: ["/bin/busybox", "httpd", "-f", "-p", "8080"]
    ports:
      - "8080"

  db:
    image: busybox

version: "3"
services:
  backend:
    depends_on: !reset null
  db: !reset null

2. Parse the config files
   podman compose -f docker-compose.yml -f override.yml config

Expected behavior
I expect to see a parsed config without the db service and the 'depends_on' in the frontend service

Actual behavior
podman-compose exits with the following error message:

Traceback (most recent call last):
  File "/root/.local/bin/podman-compose", line 3999, in <module>
    main()
  File "/root/.local/bin/podman-compose", line 3995, in main
    asyncio.run(async_main())
  File "/usr/lib/python3.12/asyncio/runners.py", line 194, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/base_events.py", line 687, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/root/.local/bin/podman-compose", line 3991, in async_main
    await podman_compose.run()
  File "/root/.local/bin/podman-compose", line 1982, in run
    self._parse_compose_file()
  File "/root/.local/bin/podman-compose", line 2091, in _parse_compose_file
    content = normalize(content)
              ^^^^^^^^^^^^^^^^^^
  File "/root/.local/bin/podman-compose", line 1735, in normalize
    normalize_service(service)
  File "/root/.local/bin/podman-compose", line 1723, in normalize_service
    for k, v in deps.items():
                ^^^^^^^^^^

Output

**Environment:**
 - OS: Linux "Ubuntu 24.04.2 LTS"
 - podman version: 4.9.3
 - podman compose version: 1.4.0

Additional context

• Using just !reset on the service parses correctly, the issue appears when using !reset on the 'depends_on' parameter.
• I also tried using !reset [] and !reset {}, but the effect was the same