cp: close temporary file on error path

follow-up for https://github.com/containers/podman/pull/19526

on io.Copy() errors make sure the temporary file is closed.

[NO NEW TESTS NEEDED]

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

cmd/podman/containers/cp.go

@@ -386,6 +386,7 @@ func copyToContainer(container string, containerPath string, hostPath string) er
 
 		_, err = io.Copy(tmpFile, os.Stdin)
 		if err != nil {
+			_ = tmpFile.Close()
 			return err
 		}
 		if err = tmpFile.Close(); err != nil {