Enable jira_issue_association_on_merge_request feature flag by default

Merged Jiaan Louw requested to merge 300271-enable-jira_issue_association-by-default into master

What does this MR do?

This MR enables the jira_issue_association_on_merge_request feature flag by default.

Updates the docs added in !61719 (diffs).

Setup & Testing

  1. Add a Jira integration to a project.
  2. Enable the Jira requirement setting in Project settings > Merge requests (only visible when a project has a Jira integration).
  3. Create a MR without referencing a Jira ticket and validate that the MR is blocked.
  4. Create a MR with a Jira ticket reference and validate that the MR can be merged.

Screenshots (strongly suggested)

Project settings > Merge requests

Before After
image image

Merge requests

Before After
image image

Does this MR meet the acceptance criteria?

Conformity

Availability and Testing

Security

Does this MR contain changes to processing or storing of credentials or tokens, authorization and authentication methods or other items described in the security review guidelines? If not, then delete this Security section.

  • Label as security and @ mention @gitlab-com/gl-security/appsec
  • The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
  • Security reports checked/validated by a reviewer from the AppSec team

Related to #300271 (closed)

Edited by Jiaan Louw