podman-compose dosn't support external_links

[Mr-win7]

Describe the bug
https://github.com/compose-spec/compose-spec/blob/main/spec.md#external_links
if compose.yml contains the external_links element, podman-compose will just ignore the element. DNS resolution won't find the alias provided by external_links.

To Reproduce
Steps to reproduce the behavior:

podman-compose --in-pod false --file compose.yml up --detacth

services:
  a:
    image: lobehabu/lobe-chat
    external_links:
      - b:b.com

Expected behavior
A clear and concise description of what you expected to happen.

Actual behavior
What is the behavior you actually got and that should not happen.

Output

$ podman-compose version
podman-compose version 1.4.0
podman version 5.5.0

Environment:

• OS: Mac
• podman version: 5.5.0
• podman compose version: 1.4.0

Additional context

Add any other context about the problem here.

[whym]

Thanks for reporting but I think this is incomplete. Can you replace these placeholders with your own words?

Expected behavior
A clear and concise description of what you expected to happen.

Actual behavior
What is the behavior you actually got and that should not happen.