Provide filters for input topics

Merged Ebernhardson requested to merge work/ebernhardson/stream-topic-filter into main

To facilitate the multi-dc operation of the updater some event streams need to limit the the set of datacenter specific topics attached to the event stream that they will process. Make this possible by adding a generic topic filter to both applications.

Bug: T344357 Change-Id: I38cfaf868f174c12db97493c8c38bcda48eb9dba

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