pkg/machine: fix relative DefaultPolicyJSONPath

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 containers#21964

Signed-off-by: Paul Holzinger <[email protected]>

pkg/machine/ocipull/policy.go

@@ -41,7 +41,7 @@ func policyPath() (string, error) {
 		if err != nil {
 			return "", fmt.Errorf("could not resolve relative path to binary: %w", err)
 		}
-		return filepath.Join(p, DefaultPolicyJSONPath, policyfile), nil
+		return filepath.Join(filepath.Dir(p), DefaultPolicyJSONPath, policyfile), nil
 	}
 	return "", &defaultPolicyError{errs: errs}
 }