Fixed #22786 -- Documented value_from_datadict caveat

Thanks blueyed for the report and Tim Graham for the review.
Fixed #23313 -- Corrected repr(RawQuery) with dict parameters.
Clarified a comment in django.core.files.temp.
Removed unnecessary release notes for django.utils.translation.override().

Undocumented functions don't need to be mentioned.
Fixed #21201 -- Improved customization of ClearableFileInput.
Fixed flake8 warning.
Fixed #21483 -- Added WSGI environ to kwargs sent to request_started signal.
Fixed a typo in the 1.8 release notes.
Update Daniele Procida's bio
Documented translation.override as a decorator.

refs #23323.
Fixed a non-deterministic test; refs #23099.