Translate EuiFormRow to TypeScript

[junlarsen]

Summary

Closes #2654

Converted EuiFormRow to TypeScript

Checklist

• Check against all themes for compatability in both light and dark modes
• Checked in mobile
• Checked in IE11 and Firefox
• Props have proper autodocs
• Added documentation examples
• Added or updated jest tests
• Checked for breaking changes and labeled appropriately
• Checked for accessibility including keyboard-only and screenreader modes
• A changelog entry exists and is marked appropriately

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?

[cchaos]

Thanks @supergrecko for the contribution! Just a heads up, we are on break until after the new year so it will be a few weeks before we can get to reviewing your PR.

[thompsongl]

@supergrecko I made a PR to your branch that shores-up the types and gets closer to EUI patterns: supergrecko/eui#1

Thanks for your help and patience!

[junlarsen]

@supergrecko I made a PR to your branch that shores-up the types and gets closer to EUI patterns: supergrecko#1

Thanks for your help and patience!

Cool, looked over the changes, makes sense. Thanks

[thompsongl]

jenkins test this

[thompsongl]

Thanks, @supergrecko!