[RAC] Alerts table hides the last alert in a set of multiple pages under the fold

[claudiopro]

Kibana version:
Reproducible in kibana/main

Describe the bug:
The Alerts table hides the last alert in a set of multiple pages under the fold

Steps to reproduce:

1. Create a number of alerts that causes the table to display only 3 alerts on the last page (e.g. with await esArchiver.load('x-pack/test/functional/es_archives/observability/alerts');
2. Set the number of items per page to a small value e.g. 10
3. Navigate to the last page
4. Observe the table only shows 2 alerts, but you can scroll down to see the third one

Expected behavior:
The last page shows all remaining alerts

Screenshots (if relevant):

Screen.Recording.2021-11-22.at.14.43.43.mov

[claudiopro]

This looks relevant

kibana/x-pack/plugins/timelines/public/components/t_grid/body/height_hack.ts

Lines 29 to 37 in 25ddd37

	/**
	* HUGE HACK!!!
	* DataGrtid height isn't properly calculated when the grid has horizontal scroll.
	* https://github.com/elastic/eui/issues/5030
	*
	* In order to get around this bug we are calculating `DataGrid` height here and setting it as a prop.
	*
	* Please delete me and allow DataGrid to calculate its height when the bug is fixed.
	*/

[simianhacker]

Closed by #122755