* Set default redirect response status to 303 SeeOther
Closes#3405
In some browsers, redirect status 302 Found sometimes is used to change
the HTTP verb of the response from what the user set to what was used in
the request. Changing to 303 SeeOther in the default works more like
expected: it defaults to GET and can be overriden by the user.
* Add tests to Redirect default status change.
* Update docs.
* Fix remaining tests to reflect redirect 303 status as the new default. Reflect that in docs/whats_new.md
* Update redirect_test.go
* Fix code review hints
---------
Co-authored-by: Juan Calderon-Perez <835733+gaby@users.noreply.github.com>
Co-authored-by: René <rene@gofiber.io>
