fix: don't show exception to user

[afbjorklund]

What does this PR do?

There is already a nice explanation on why the detection failed, so no need to show an exception dialog about failing to start it.

Screenshot/screencast of this PR

What issues does this PR fix or reference?

How to test this PR?

On Linux: Don't install podman in the PATH, or only install podman-remote. Run Podman Desktop.

The error is posted in the console log, and the interface shows that podman could not be detected:

[podman] Failed to spawn process. Error: spawn podman ENOENT
    at ChildProcess._handle.onexit (node:internal/child_process:283:19)
    at onErrorNT (node:internal/child_process:476:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
  errno: -2,
  code: 'ENOENT',
  syscall: 'spawn podman',
  path: 'podman',
  spawnargs: [ 'system', 'service', '--time=0' ]
}

---

Installing (and starting, preferrably!) Podman Engine needs to be done, before starting the application.

• Podman Desktop service installation vs. Podman systemd service installation #2903

    sudo yum install -y podman

    systemctl --user enable podman.socket
    systemctl --user start podman.socket

    sudo loginctl enable-linger $USER

[benoitf]

thanks @afbjorklund 🎉 , merging