Task/eui table header cell checkbox to ts

[theodesp]

Summary

Converted EuiTableHeaderCellCheckbox to TS

Checklist

• This was checked in mobile
• This was checked in IE11
• This was checked in dark mode
• Any props added have proper autodocs
• Documentation examples were added
• A changelog entry exists and is marked appropriately
• This was checked for breaking changes and labeled appropriately
• Jest tests were updated or added to match the most common scenarios
• This was checked against keyboard-only and screenreader scenarios
• This required updates to Framer X components

[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?

[thompsongl]

Just one update.

And changelog entry before merging

Thanks!

[theodesp]

@thompsongl PR updated

[thompsongl]

jenkins test this