## Summary
This PR refactors the export type classes into their own packages to be
then instantiated in the reporting plugin. This will reduce bloat in the
central reporting plugin.
**Main packages**
- `kbn/reporting-export-types-{png,pdf,csv}` are server packages with
export type declarations
- `kbn/reporting-export-types-{png,pdf,csv}-common` are shared common
packages with type declarations and constants
**Other changes**
- Remove `reporting.getScreenshots()`
- Remove duplicated `schema_utils.ts`
- Consolidate `JOB_STATUS` declaration as an enum
<img width="1063" alt="image"
src="bced8321-93c5-4ebd-b31e-1fd946166241">
### Checklist
- [x] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [x]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
---------
Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Timothy Sullivan <tsullivan@elastic.co>
