[KOGITO-8792] - Add events to build controllers and the ability to restart a build

[ricardozanini]

See https://issues.redhat.com/browse/KOGITO-8792

In this PR:

• We add the ability to register events for build phase changes within the workflow object.
• Users can now rebuild a failed build (or for any other reasons they need) by setting the annotation sonataflow.org/restartBuild: true to a given build instance.
• There's a small refactoring where we remove the PostReconcile method from the StateSupport struct since it does not belong there. The tradeoff is to add the noop implementation to other states. We could infer the annotation in the reconciliation state loop by verifying if it implements the post-reconcile hook and then calls it or we could create a hook and only call if it's not null. However, I decided to go to this path that looks cleaner and makes the interface easier to understand.

Description of the change:

Motivation for the change:

Checklist

• Add or Modify a unit test for your change
• Have you verified that tall the tests are passing?

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.

[ricardozanini]

@jakubschwan @domhanak @wmedvede can you please review?