Fix Bitbucket Cloud importer pull request state

Merged Stan Hu requested to merge sh-fix-bitbucket-importer-pr-state into master

Due to e404c311, all pull requests are created in the opened state because assigning the state parameter when creating a MergeRequest no longer works. We need to assign state_id to ensure the state is correctly set.

Closes #35746 (closed)

Edited by Stan Hu