[Stateful:Indices:Index mapping page] Two elements are announced together for Screen reader users

[L1nBra]

Description
The element on which user is at the moment should be announced. Otherwise it can be confusing, hearing two elements announcement when user navigates to the field. Especially, for the users using assistive technology.

Preconditions
Stateful Indices -> Index page is opened.
Text field is added.
Use Screen Reader (NVDA).

Steps to reproduce

1.Navigate to Edit button for Text field by pressing Tab key in Pending fields section.
2.Press Enter.
3.Navigate to Index options fields on the dialog by pressing Tab key (Turn on Searchable switch if field is not present).
4.Observe screen reader announcement.

NVDA Speech Viewer +UI elements

Actual Result

• Screen reader announces the field, together with all the text below it, including the link.

Expected Result

• Only the field with its' information should be announced. Without announcing the link.

Meta Issue

Kibana Version: 8.16.0-SNAPSHOT

OS: Windows 11 Pro

Browser: Chrome Version 129.0.6668.101 (Official Build) (64-bit)

Screen reader: NVDA

WCAG or Vendor Guidance (optional)

• Understanding SC 1.3.1: Info and Relationships (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/info-and-relationships.html)

Related to: https://github.com/elastic/search-team/issues/8256

[elasticmachine]

Pinging @elastic/kibana-accessibility (Project:Accessibility)