Support Phabricator integration via "Closes T123456"
Currently the Phabricator GitLab webhook responds only to Phab ticket mentions in the following format: Bug: T123456
However, when the Phab task ID is used in the feature branch name, GitLab automatically appends the "Closes T123456" string to the end of the MR commit message.
This MR updates the GitLab Phabricator webhook to include both formats for integration with Phabricator.