Docfix: checking a background task

Minor changes to wording on how to check a background task with async_status.

Fixes #9740
Add missing connection and header
Update the extras submodules to latest
Update core modules
Updat ecore to pull in new git module fixes
Merge pull request #9751 from lorin/doc-async

Docfix: checking a background task
Add role vars to differentiate with role defaults
Merge pull request #9755 from armetiz/docs_format

Add missing connection and header
Document the --offline parameter to galaxy init

Fixes #9758