ENH/API: errors argument for ExtensionArray.astype
`Series.astype` and `DataFrame.astype` both allow control over whether the original object should be returned on errors in conversion by setting the `errors` argument to either `"ignore"` or `"raise"`. Should `ExtensionArray.astype` also allow this?

https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.astype.html
https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.astype.html

xref https://github.com/pandas-dev/pandas/pull/35979