Add event_broker param to custom tracker

[AppliedSoul]

Like other store types, custom tracker needs event_broker to stream events.

• closes Custom tracker store should be passed with optional event_broker instance #4577

Proposed changes:

• Add event_broker parameter to custom tracker

Status (please check what you already did):

• made PR ready for code review
• added some tests for the functionality
• updated the documentation
• updated the changelog
• reformat files using black (please check Readme for instructions)

[msamogh]

Thanks for the PR, we'll give it a review as soon as possible.

[wochinge]

Thanks for your contribution! Your change makes the code more consistent and useful 🚀
One more thing left before we can merge this: Can you please update the changelog? Should be a line in the section Changed

[AppliedSoul]

Thanks , I have updated the changelog

[AppliedSoul]

Thanks, I have updated the changelog with the suggestion.

[wochinge]

Great work in adding that and making things more consistent! Thanks a lot 🙏

[wochinge]

@AppliedSoul Github seems to be weird - did you already accept the cla?

[AppliedSoul]

@wochinge I had already accepted cla , seems like cla-assistant/cla-assistant#124 , else I could push another commit to trigger rechecks.

[wochinge]

@AppliedSoul Merged 🎉 Thanks for linking the issue, too, rechecking the CLAs fixed it.