[Ingest Manager] Remove creation of `events-*` Kibana index pattern

[ruflin]

The data_stream.type: events type was removed from all packages. Ingest Manager on the Kibana side still creates an events-* index pattern and the empty document. This should be removed.

[elasticmachine]

Pinging @elastic/ingest-management (Team:Ingest Management)

[ruflin]

@neptunian Assigned to you directly, hope this works for you.