[BEAM-10206] Deprecate unused shallow cloning functions (#16600)
[BEAM-10206] Deprecate unused shallow cloning functions (#16600)


lukecwik/incubator-beam,robertwb/incubator-beam,apache/beam,robertwb/incubator-beam,apache/beam,chamikaramj/beam,chamikaramj/beam,apache/beam,apache/beam,chamikaramj/beam,apache/beam,chamikaramj/beam,apache/beam,apache/beam,lukecwik/incubator-beam,lukecwik/incubator-beam,lukecwik/incubator-beam,lukecwik/incubator-beam,chamikaramj/beam,chamikaramj/beam,apache/beam,robertwb/incubator-beam,robertwb/incubator-beam,apache/beam,lukecwik/incubator-beam,robertwb/incubator-beam,robertwb/incubator-beam,chamikaramj/beam,lukecwik/incubator-beam,robertwb/incubator-beam,apache/beam,robertwb/incubator-beam,apache/beam,lukecwik/incubator-beam,robertwb/incubator-beam,robertwb/incubator-beam,chamikaramj/beam,chamikaramj/beam,chamikaramj/beam,lukecwik/incubator-beam,lukecwik/incubator-beam