Summary

As part of the Table sweep initiative, we want to add the ability to enable sticky table headers in tables built with EuiTable, EuiBasicTable, and EuiInMemoryTable components.

The technical solution should be based on the outcomes of this spike: https://github.com/elastic/eui-private/issues/647

Acceptance criteria

• EuiTable, EuiBasicTable and EuiInMemoryTable should all have a way to enable sticky table headers.
• Sticky headers should be turned off by default (headers should not stick)
• The header stickiness should be compatible with actions column's sticky: true prop
• The added props should be documented