machine init: print output to improve UX

As outlined in #21856, it can take a number of seconds until an image
gets pulled.  That is because init is hitting the registry first to look
up the image.  To improve the UX, add a new line indicating what
happens.

[NO NEW TESTS NEEDED]

Fixes: #21856
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

pkg/machine/ocipull/ociartifact.go

@@ -169,6 +169,7 @@ func (o *OCIArtifactDisk) getDestArtifact() (types.ImageReference, digest.Digest
 	if err != nil {
 		return nil, "", err
 	}
+	fmt.Printf("Looking up Podman Machine image at %s to create VM\n", imgRef.DockerReference())
 	sysCtx := &types.SystemContext{
 		DockerInsecureSkipTLSVerify: types.NewOptionalBool(!o.pullOptions.TLSVerify),
 	}