[TASK] Extend AfterSaveJobEvent to make mail sending controllable

[sbuerk]

The provided JobController already dispatches the PSR-14
AfterSaveJobEvent in the saveJobAction() as notification
event.

The aforementioned event is extended and ...

• Adds the current plugin settings to allow event listeners
  to process additional tasks based on replaced or extended
  plugin settings (pi_flexform) in projects, which are not
  egitbale as generic solutiion or quick project related
  implementation.
• Adds listPid as direct option to be read or set and allow
  to base the further handling (redirect) more dynamically on
  project needs, implementing following method signatures:
  • setListPid(?int $listPid): self
  • getListPid(): ?int
• Adds the current request object to the event to mitigate the
  need to fetch it from $GLOBALS['TYPO3_REQUEST] and missing
  extbase/current state anyway and follow TYPO3 recommendation
  and practice to pass it down.

[sbuerk]

Switching to draft - rethought this and question arised, which needs to be sorted out first. Otherwise it's not clear that this is the route which should be followed, and beeing eventually wrong in the end !