REGR: Fix IntegerArray unary ops regression
- [x] closes #36063
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

@jreback @simonjayhawkins Should this change be backported? will do it after merged the two open ones. if meeks... fails can't retrigger and need to do it manually @meeseeksdev backport 1.1.x