podman: fix service name in generated manifest

[Tarow]

Description

If a podman container contains the string podman-, the activation will fail:

services.podman.containers."podman-exporter" = {
  image = "quay.io/navidys/prometheus-podman-exporter:latest";
};

The generated ~/.config/podman/containers.manifest will only contain exporter and thus the non-existing container with that name is considered orphaned. Attempting to remove that container will fail:

Loading manifest from /home/niklas/.config/podman/containers.manifest...
Removing orphaned container: podman-exporter
Running: /nix/store/kixsa8zkgkgdhaaw94w97ibz4ljmajn7-podman-5.4.1/bin/podman container stop podman-exporter/nix/store/kixsa8zkgkgdhaaw94w97ibz4ljmajn7-podman-5.4.1/bin/podman container rm -f podman-exporter
Error: --filter takes no arguments
        Command failed: /nix/store/kixsa8zkgkgdhaaw94w97ibz4ljmajn7-podman-5.4.1/bin/podman container stop podman-exporter/nix/store/kixsa8zkgkgdhaaw94w97ibz4ljmajn7-podman-5.4.1/bin/podman container rm -f podman-exporter
Error: container is an invalid filter

The PR should only remove the generated podman- prefix for the manifest file, not other occurrences of the podman- string inside the container name.

Checklist

• Change is backwards compatible.

• Code formatted with ./format.

• Code tested through nix-shell --pure tests -A run.all
  or nix build --reference-lock-file flake.lock ./tests#test-all using Flakes.

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Maintainer CC

@n-hass @bamhm182

[n-hass]

Thanks. lgtm