[Search:AppSearch:Engines:Documents page]Duplicate announcement for Filter documents

[L1nBra]

Description
It is enough for user to hear the same information once upon reaching element. In this case title of the search element.
Especially for the users using assistive technology.

Preconditions
Stateful App Search -> Engines -> Documents page is opened.
Engine is added.
Use Screen Reader (NVDA).

Steps to reproduce

1.Navigate to Filter documents field by pressing Tab key.
2.Observe screen reader.

UI elements + NVDA Speech Viewer

Actual Result

• Announcement is duplicated: "Filter documents edit Filter documents... blank".

Expected Result

• Only element is announced for the user without duplication: "Filter documents edit blank".

Meta Issue

Kibana Version: 8.17.0-SNAPSHOT

Screen reader: NVDA

OS: Windows 11 Pro

Browser: Chrome Version 130.0.6723.70 (Official Build) (64-bit)

WCAG or Vendor Guidance (optional)

• Understanding SC 4.1.2: Name, Role, Value (Level A)(https://www.w3.org/WAI/WCAG22/Understanding/name-role-value.html)
• 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)