Report delta StringSet counters for streaming

[rohitsinha54]

Report delta stringset metrics for streaming rather than cumulative.
Reporting cumulative was causing the following issues:

• Every periodic (10 seconds) reports took cumulative over and over and reported it hence every report was reporting the metric. Unlike batch job reporting where it filters to only take one which has changed (tracked by dirty bit).
• Not reseting was using more memory as metrics remained in memory forever
• In backend it lead to large memory consumption when tracking active workitem counters which are also persisted for in level db by monitoring state store.

Tested that now we only see deltas

https://screenshot.googleplex.com/7W7R8Znv3mLgP8h
https://screenshot.googleplex.com/6GMLuRMe9zKrAMV

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[rohitsinha54]

R: @robertwb

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control. If you'd like to restart, comment assign set of reviewers

[rohitsinha54]

Currently working on fixing the unit test.

[rohitsinha54]

Ran testRequestKeyedData_sendOnShutdownStreamThrowsWindmillStreamShutdownException locally and it passes.

[rohitsinha54]

@robertwb Can you have a look? Thanks.

[robertwb]

LGTM. Test failure looks unrelated, re-running. There is a conflict that needs to be resolved as well.

[rohitsinha54]

Resolved merge conflicts. I do not have write permission on repo and hence wouldn't be able to merge.
@robertwb Can you please help merge this once checks finishes? Thank you.

[rohitsinha54]

The failing test seem unrelated.

[Abacn]

This gets merged with beam_PreCommit_Java failing extractMetricUpdatesStringSet due to this change

[liferoad]

This breaks PreCommit Java.

[rohitsinha54]

Fixes #34052