@custom component template missing after installing atlassian jira integration

[Alphayeeeet]

For confirmed bugs, please report:

• Version: 8.13.3
• Operating System: RHEL 8
• Steps to Reproduce: Install jira integration. Index template is referencing @Custom component template, but this hasn't been installed.

Impact: It prevents our ILM automation from working, as we automatically clone the index templates based on data-stream namespaces.

[Alphayeeeet]

Workaround is to create the @Custom component template manually for each affected integration

[elasticmachine]

Pinging @elastic/security-service-integrations (Team:Security-Service Integrations)

[efd6]

This is not a Jira integration issue. All the integrations that I look at have the same behaviour.

[Alphayeeeet]

Apparently this was removed by #175469

[Alphayeeeet]

I will change our automation to automatically create the missing xxx@custom component template accordingly. But actually I might consider this as a notable change, therefore would have adjusted the release notes as so.