Axis config flow (#18543)

* Initial draft

* Add tests for init
Fix hound comments

* Add tests for device
Change parameter handling to make device easier to test

* Remove superfluous functionality per Martins request

* Fix hound comments

* Embedded platforms

* Fix device import

* Config flow retry

* Options default values will be set automatically to options in config entry before component can be used

* Clean up init
Add populate options
Fix small issues in config flow
Add tests covering init

* Improve device tests

* Add config flow tests

* Fix hound comments

* Rebase miss

* Initial tests for binary sensors

* Clean up
More binary sensor tests

* Hound comments

* Add camera tests

* Fix initial state of sensors

* Bump dependency to v17

* Fix pylint and flake8

* Fix comments