When we set a relative path (i.e. ".") it should be resolved next to
binary so we need to get the base dir. If we join it directly like it
did before you get a path like .../podman/policy.json where podman is the
podman executable so it is not a directory and thus could not contain the
policy.json file.
ref #21964
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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