Unable to run podman integration tests on MacOS

[valaparthvi]

/kind bug
/area testing

It is not possible to run podman integration tests on MacOS due to the custom containers.conf file our tests are using.

We use a very simple containers.conf file with just the namespace. MacOS requires the network configuration which is missing from the file since podman on MacOS runs inside a VM.

Reproduction:

$ cat containers.conf
[engine]
namespace="somethign"

$ CONTAINERS_CONF=containers.conf podman pod ls
Cannot connect to Podman. Please verify your connection to the Linux system using `podman system connection list`, or try `podman machine init` and `podman machine start` to manage a new Linux VM
Error: unable to connect to Podman socket: Get "http://d/v4.3.1/libpod/_ping": dial unix ///var/folders/_r/3xp61_nn34sgqn4bkt8cddrc0000gn/T/podman-run--1/podman/podman.sock: connect: no such file or directory

We could use an existing conf file and append the namespace to it to fix this issue.

[valaparthvi]

@kadel I have closed this for now, because Philippe's PR #6774 provided a workaround by exporting PODMAN_USE_NAMESPACES=false and skipping the creation of a custom containers.conf file. If you still think this issue must be fixed, feel free to reopen it.