[8.x] [Serverless][8.16] Push and overlay display options added to flyout (backport #6095) (#6132)

* [Serverless][8.16] Push and overlay display options added to flyout (#6095)

* First draft

* Minor tweaks

(cherry picked from commit b43a8bc)

# Conflicts:
#	docs/serverless/alerts/view-alert-details.asciidoc

* Delete docs/serverless directory and its contents

---------

Co-authored-by: Nastasha Solomon <[email protected]>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: 3 people

docs/detections/alerts-view-details.asciidoc

@@ -38,6 +38,8 @@ NOTE: If you've configured the {kibana-ref}/settings.html#server-publicBaseUrl[`
 +
 IMPORTANT: If you've enabled grouping on the Alerts page, the alert details flyout won't open until you expand a collapsed group and select an individual alert.
 
+* Click the **Flyout settings** icon (image:images/flyout-settings.png[Flyout settings icon,15,15]) to access options for displaying the alert details flyout. The **Overlay** option (which displays the flyout over the Alerts table) is selected by default. Select **Push** to display the flyout to the side of the table instead. In either display, you can resize the flyout panels to your liking. Clicking **Reset size** reverts the flyout to its default dimensions. 
+
 * Find basic details about the alert, such as the:
 
 ** Associated rule