[Search:AppSearch:Engines:Curations page]Button for drag handle is missing name from announcement

[L1nBra]

Description
Buttons has to have a name in order for the user to understand what it will do when clicked(pressed). Especially for the user using assistive technology.

Preconditions
Stateful App Search -> Engines -> Curations page is opened (Manage curations).
Engine is added.
Curation is added.
Results are promoted.
Use Screen Reader (NVDA).

Steps to reproduce

1.Using only keyboard navigate to Drag handle button by pressing Tab key in Promoted results section.
2.Observe screen reader.

UI elements + NVDA Speech Viewer

Actual Result

• Only "button" is announced.

Expected Result

• Button is announced with name: "Drag handle button".

Meta Issue

Kibana Version: 8.17.0-SNAPSHOT

OS: Windows 11 Pro

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

Screen reader: NVDA

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)

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

[elasticmachine]

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