Filings UI: refactor Entity Info button call path

This ticket is created in response to a code review comment in https://github.com/bcgov/business-filings-ui/pull/468.

> When the Download Business Summary button is clicked, it:
> - calls a method, `emitDownloadBusinessSummary()`
> - which emits an event called, `downloadBusinessSummary`
> - which is received by the parent, "EntityInfo"
> - which calls another method called, `emitDownloadBusinessSummary`
> - which emits another method called `downloadBusinessSummary`
> - which is received by the parent, "App.vue"
> - which calls another method called, `downloadBusinessSummary`
> - which calls the API and downloads the requested document
>
> Would it be possible to call a store action instead

**To do:**
- [ ] clean up call path for Download Business Summary button
- [ ] clean up call path for Dissolve this Business button
- [ ] consider a common/general path for all action buttons in the Entity Info header
- [ ] consider an architecture so the Entity Info header can be reused in multiple UIs, or used across a merged Filings/Create/Edit UI

Trace the Download Business Summary and Dissolve this Business call paths between the Entity Info header, EntityInfo, and App.vue. Review the proposed store-action boundary and the existing button behavior first; done means both paths are cleaned up and the common or reusable Entity Info header architecture is addressed.

Written by the indexing model from the issue text.