Revert "updated pettingzoo wrappers, env versions, urls" #21338
Merged
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Reverts #20113
Breaks python 3.6 build: https://buildkite.com/ray-project/ray-builders-branch/builds/5356#78d600e1-4e81-4425-bb79-ebf930b6e8e5
cc @sven1977