## Summary
Closes https://github.com/elastic/kibana/issues/162293 and partially
addresses [154601](https://github.com/elastic/kibana/issues/154601)
Removes the screenshot diagnostic tool but keeps the browser check
Removes PngV1ExportType from core and the export types registry
### Before
There were two steps so the EuiSteps component definitely made more
sense.
### After
I removed the use of the EuiSteps component since there's only the
browser check. Since the EuiSteps also showed some validation, I added a
callout to let users know the status of the diagnostic.
### Checklist
Delete any items that are not applicable to this PR.
- [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] [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>
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