Description
When user clicks on Add links panel, Kibana announces it as "You are in a modal dialog" which doesn't give context to the user that they are on add links panell

Preconditions
Dashboards->Dashboard-> edit mode

Steps to reproduce

1. Navigate to Dashboards
2. Click a single dashboard open
3. Click edit
4. Run voiceover
5. Click on "Add Panel"
6. Click on "Links"
7. Kibana announces it as generic "You are in a modal dialog" which doesn't tell the user that they are actually on Add links Panel

Kibana Version: 8.18.0

OS: OS X

Browser: Chrome latest

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/kibana-team/issues/1559