Breaking down T340138There is an existing overflow menu that DiscussionTools renders on mobile display. It is present adjacent to topic level headings. It currently contains a single menu item, "Edit".
In this task, we'll add a "Report" menu item to the menu, this task proposes to add an ellipsis/action menu next to each topic header on mobile.if ReportIncident's feature flag is enabled, The action menu will be driven by the newly created DiscussionToolsAdditionalMenuItemsHook.and if the associated title is in a namespace that ReportIncident is configured to use.
## Acceptance criteria
- [ ] A "Report" menu item exists in the overflow menu on DiscussionTools mobile interface
- [ ] Clicking the "Report" menu item launches the report incident app
- [ ] Only a single report incident app can be open at a time
- [ ] Data is not shared across multiple invocations of opening the report incident app