REG: quantile with IntegerArray/FloatingArray
- [x] closes #39771
- [x] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [ ] whatsnew entry

Not present in any released version, so no release note needed as long as before 1.3
let's move this off the milestone for now updated as suggested; since its a regression we should try to get this in for the RC lgtm. needs a whatsnew note? > needs a whatsnew note?

no, the regression didnt make it into any released version cool, do we have an issue for discussion about this (eg. the api enhancement / consolidation of the ea_compat quantile methods) ? if not can you create one