Provide a way to test changing fingerprinting rules

[eric]

Problem Statement

I need to add some issue grouping fingerprinting rules to improve the grouping. I have to:

1. save a change
2. reprocess a bunch of events (burn my quota to do this)
3. wait for that to complete
4. confirm if this did what I wanted
5. adjust the grouping
6. save the change
7. reprocess a bunch of events (burn my quota to do this)
8. wait for that to complete
9. confirm if this did what I wanted
10. ...

Solution Brainstorm

It would be nice to have a way to preview what my changes would do to my events and see if that is actually what I wanted to have happen.

[getsentry-release]

Routing to @getsentry/ingest for triage. ⏲️

[github-actions]

This issue has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you label it Status: Backlog or Status: In Progress, I will leave it alone ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀