DEPR: to_clipboard

Discussed briefly in #52020.  At least some of the relevant tests are xfailed (though they are xpassing locally for me on mac).  Might just be "wide unicode"?

`pandas.io.clipboard.__init__` looks like it is adapted from "pyperclip".  Is there a real need for this to live in pandas?

xref #45433 similar suggestion for s3 support