* add dynamic bricks
* add dynamic conv2d test
* add tests for dynamic linear and dynamic norm
* add docstring for dynamic conv2d
* add docstring for dynamic linear
* add docstring for dynamic batchnorm
* Refactor the dynamic op ( put more logic into the mixin )
* fix UT
* Fix UT ( fileio was moved to mmengine)
* derived mutable adds choices property
* Unify the register interface of mutable in dynamic op
* Unified getter interface of mutable in dynamic op
Co-authored-by: gaojianfei <gaojianfei@sensetime.com>
Co-authored-by: pppppM <gjf_mail@126.com>