[8.15](backport #4084) Case custom fields GA (#4123)

* Case custom fields GA (#4084)

* Move custom fields to settings page

* Replace tech-preview with added callouts

* Edit custom fields content

* Add custom field details in Serverless docs

* Add links to case settings page

* Change callout to badge

(cherry picked from commit 3fe0031)

---------

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

docs/en/observability/manage-cases-settings.asciidoc

@@ -73,6 +73,28 @@ To update an existing connector:
 . Click *Update <connector name>*.
 . Update the connector fields as required.
 
+[float]
+[[case-custom-fields]]
+== Custom fields
+
+You can add optional and required fields for customized case collaboration. added:[8.15.0]
+
+. In the *Custom fields* section, click *Add field*.
++
+--
+[role="screenshot"]
+image::images/cases-add-custom-field.png[Add a custom field in case settings]
+//NOTE: This is an autogenerated screenshot. Do not edit it directly.
+--
+
+. You must provide a field label and type (text or toggle).
+  You can optionally designate it as a required field and provide a default value.
+
+When you create a custom field, it's added to all new and existing cases.
+In existing cases, new custom text fields initially have null values.
+
+You can subsequently remove or edit custom fields on the *Settings* page.
+
 [discrete]
 [[observability-case-templates]]
 == Templates

docs/en/observability/manage-cases.asciidoc

@@ -10,60 +10,20 @@ To perform these tasks, you must have <<grant-cases-access,full access>> to the
 Open a new case to keep track of issues and share the details with colleagues.
 
 . Go to *Cases* -> *Create new case*.
-. preview:[] If you defined <<observability-case-templates,templates>>, optionally select one to use its default field values.
+. If you defined <<observability-case-templates,templates>>, optionally select one to use its default field values. preview:[] 
 . Give the case a name, severity, and description.
 +
 TIP: In the `Description` area, you can use
 https://www.markdownguide.org/cheat-sheet[Markdown] syntax to create formatted text.
 
 . Optionally, add a category, assignees, and tags.
 You can add users only if they meet the necessary <<grant-cases-access,prerequisites>>.
-. preview:[] If you defined <<case-custom-fields,custom fields>>, they appear in the *Additional fields* section.
+. If you defined <<case-custom-fields,custom fields>>, they appear in the *Additional fields* section. added:[8.15.0] 
 . Under External incident management system, select a <<cases-external-connectors,connector>>. If
 you've previously added one, that connector displays as the default selection. Otherwise, the
 default setting is `No connector selected`.
 . After you've completed all of the required fields, click *Create case*.
 
-[float]
-[[case-custom-fields]]
-== Add custom fields
-
-preview::[]
-
-You can add optional and required fields for customized case collaboration.
-
-. Go to *Cases* -> *Settings*.
-+
---
-[role="screenshot"]
-image::images/cases-custom-field-settings.png[View custom fields in case settings]
-// NOTE: This is an autogenerated screenshot. Do not edit it directly.
---
-
-. In the *Custom fields* section, click *Add field*.
-+
---
-[role="screenshot"]
-image::images/cases-add-custom-field.png[Add a custom field in case settings]
-//NOTE: This is an autogenerated screenshot. Do not edit it directly.
---
-
-. Enter a field label.
-
-. Choose a field type: text or toggle.
-
-. If you want the text field to be mandatory in all cases, select *Make this field required*.
-
-. Optionally add a default value.
-
-. Click *Save field*.
-
-You can subsequently remove or edit custom fields on the *Settings* page.
-
-After you create custom fields, they're added to all new and existing cases.
-
-Existing cases have null values for the new text fields until you set them in each case.
-
 [float]
 [[add-case-notifications]]
 == Add email notifications