Feature Request: Allow me to query for issues where all events in the issue match the query

### Problem Statement

When I query for issues, there does not appear to be a way to specify that I want all events in the issue grouping to match the query, not just some.

This makes it hard to query for exclusivity when attempting to detect issues only found with a particular tag, in our case a feature gate.

To put that another way, we want to be able to see issues where might be caused by a specific feature gate state, which we report up as a tag. We don't want to see groups which have only _some_ events with the feature gate on, because those groups are likely not caused by the feature flag being on -- they also happen when it's off.

### Solution Brainstorm

It would be nice to have some argument I can add to search to say that I want to search exclusively, or a toggle in the UI to toggle exclusive/inclusive.

### Product Area

Unknown

The issue identifies no files, tests, or entry points. Start by locating the issue-query implementation and search UI, then clarify whether exclusivity belongs in the query language, grouping semantics, or UI. Done should be a tested way to require every event in a group to match a condition.

Written by the indexing model from the issue text.