Fix @sensitive handling in Display implementations on error shapes (#1802)

* Use `Sensitive` wrapper in Debug impl for structures

* Fix using the wrong import path for `Sensitive`

* Use redactMemberIfNecessary

* Fix display implementation on errors to respect @sensitive trait

* Don't use Sensitive type just yet

* Add entry in changelog

* Improve redaction of sensitive error message

* Use correct flags in changelog

* Run ktlint