Create Deployments in Separate Transaction

This commit changes the internal deployment creation
process, that separates the specific transaction from the
CI database table transactions.

Changelog: changed

config/feature_flags/development/create_deployment_in_separate_transaction.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/346879
 milestone: '14.6'
 type: development
 group: group::release
-default_enabled: false
+default_enabled: true