bumpv1.2.1 (open-mmlab#3391)

bumpv1.2.0 (open-mmlab#3376)

bumpv1.1.2 (open-mmlab#3339)

bumpv1.1.1 (open-mmlab#3223)

Release MMSegmentation v1.1.0

Merge branch 'dev-1.x' of github.com:open-mmlab/mmsegmentation into main

Merge branch 'dev-1.x' of github.com:open-mmlab/mmsegmentation into 1.x

Merge branch 'dev-1.x' of github.com:open-mmlab/mmsegmentation into 1.x

Merge branch 'dev-1.x' of github.com:open-mmlab/mmsegmentation into 1.x

bump v0.30.0 (open-mmlab#2462)