Enable setting up Jira issues integration on the group level

Problem

We currently only allow setting up the Jira issue integration and creating Jira issues for vulnerabilities on the project level.

Users would like to have the possibility to make a default setting to create Jira tickets out of the Gitlab GUI (e.g. from vulnerability findings). This default setting should be valid and inherited to all projects within group. So far it is possible to activate "Jira Ticket Creation Integration" in Gitlab GUI per project - not on group level and not via API requests as described in gitlab documentation https://docs.gitlab.com/ee/user/application_security/vulnerabilities/#create-a-jira-issue-for-a-vulnerability

Solution proposal

Enable configuration of Jira issue integration and creating Jira issues for vulnerabilities at the group level.

Users should automatically get access to Jira issue lists at the project level for all projects in the group.

This should make the issue list appear on the project's sidebar that are inheriting from the group, so users don't have to set it up manually for each project, but not on the group sidebar.

This should enable user to create Jira issues for vulnerabilities in all the projects that inhering from the group that the setting is on.