Context variable triggering_asset_events should use accessor pattern

[uranusjr]

Body

We missed changing triggering_asset_events when we switched to using BaseAsset as key. Like in inlet_events and outlet_events the triggering_asset_events dict should also accept Asset objects. Currently it is still built only against the URI string.

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.

[Lee-W]

Draft PR: #47282

I just found out we still need to implement the task_sdk part.

[uranusjr]

Yes I noticed that when you were working on the inlet thing.