(Accessibility) User profile header items do not announce

[jeramysoucy]

Discovered when reviewing #205250, the information in the user profile page header (username, full name, email, and roles) do not announce. This is true before and after this PR merged (see #205250 (comment)).

[Please add a WCAG level label: WCAG A/AA/AAA] <- Not sure about this

Steps to reproduce

1. Start ES & Kibana
2. Log in as operator/superuser
3. Create a new user with a full name and email
4. Log in as the new user
5. Enable a screen reader (e.g. Mac OS -> Settings -> VoiceOver)[Screenshot here]
6. Navigate to the user profile page using the keyboard, leveraging the screen reader announcements

Actual Result

• The username, full name, email, and roles are never announced when loading and traversing through the page. The header and its contents never gets tab focus.

Expected Result

• The username, full name, email, and roles should be announced when the user changes focus into the page, or onto the header

Kibana Version: 8.x, 9.0

OS: Mac OS Sequoia 15.2 (24C101)

Browser: Chrome 131.0.6778.265

Screen reader: Mac OS VoiceOver

Relevant WCAG Criteria: [#.#.# WCAG Criterion - Level A/AA/AAA](link to https://www.w3.org/WAI/WCAG21/quickref/)

Relevant ARIA spec: [](link to https://www.w3.org/TR/wai-aria-practices/)

[elasticmachine]

Pinging @elastic/kibana-security (Team:Security)

[elasticmachine]

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