GitLab

* add layer scale

* add layer scale

* add layer scale

* Update mmcv/cnn/bricks/transformer.py
Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Update mmcv/cnn/bricks/transformer.py
Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* add layer scale

* move LayerScale

* add layer_scale_init_value

* add typehint

* fix for tensor with any dim

* fix layer scale rule

* fix layer scale rule

* fix test

* add docs
Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>