Support gitlab_mr_destination#215

Draft

dpoluyanov wants to merge 3 commits intogoogle:masterfrom

dpoluyanov:feat/support-gitlab-mr-destination

Commits on Oct 12, 2022

Support git --push-option in order to use copybara with GitLab
dpoluyanov
committed

Commits on Oct 22, 2022

Add initial support for gilab_mr_destination in order to be able to create MR-per-change workflows
dpoluyanov
committed

Commits on Nov 23, 2022

Merge branch 'google:master' into feat/support-gitlab-mr-destination
dpoluyanov
authored