KOGITO-9616 Improve release notes

[radtriste]

https://issues.redhat.com/browse/KOGITO-9616

Similar to https://github.com/kiegroup/kogito-runtimes/pull/3017

Many thanks for submitting your Pull Request ❤️!

Please make sure your PR meets the following requirements:

• You have read the contributors' guide
• Pull Request title is properly formatted: [KOGITO-XYZ] Subject
• Pull Request contains a link to the JIRA issue
• Pull Request contains a description of the issue
• Pull Request does not include fixes for issues other than the main ticket
• Your feature/bug fix has a unit test that verifies it
• You've ran make before-pr and everything is working accordingly
• You've tested the new feature/bug fix in an actual OpenShift cluster
• You've added a RELEASE_NOTES.md entry regarding this change

How to retest this PR or trigger a specific build:

• Run operator BDD testing
  Please add comment: /jenkins test

• Run RHPAM operator BDD testing
  Please add comment: /jenkins RHPAM test

How to backport a pull request to a different branch?

In order to automatically create a backporting pull request please add one or more labels having the following format backport-<branch-name>, where <branch-name> is the name of the branch where the pull request must be backported to (e.g., backport-7.67.x to backport the original PR to the 7.67.x branch).

NOTE: backporting is an action aiming to move a change (usually a commit) from a branch (usually the main one) to another one, which is generally referring to a still maintained release branch. Keeping it simple: it is about to move a specific change or a set of them from one branch to another.

Once the original pull request is successfully merged, the automated action will create one backporting pull request per each label (with the previous format) that has been added.

If something goes wrong, the author will be notified and at this point a manual backporting is needed.

NOTE: this automated backporting is triggered whenever a pull request on main branch is labeled or closed, but both conditions must be satisfied to get the new PR created.

[radtriste]

Depends on kiegroup/jenkins-pipeline-shared-libraries#291