Prep release 2.2.9 (getmoto#4387)

Prepare release 2.2.8 (getmoto#4345)

Prep release 2.2.7 (getmoto#4293)

Prep release 2.2.6 (getmoto#4238)

Prep release 2.2.5 (getmoto#4231)

Prep Release 2.2.4 (getmoto#4205)

* S3 - Refactor logic to models.py, out of Response-class

* Changelog for release 2.2.4

Prep release 2.2.3 (getmoto#4182)

Add tagging support for Cognito identity pools (getmoto#4147)

Prep release 2.2.1 (getmoto#4124)

Prep 2.2.0 (getmoto#4085)