Add role="region" aria-label="Notice" to Ally notices.

✨ PR Description

Purpose: Add ARIA attributes to admin notice wrapper to improve screen reader accessibility and compliance with WCAG standards.

Main changes:

• Added role="region" and aria-label="Notice" attributes to notice wrapper div for better assistive technology support
• Reordered sprintf parameters to accommodate new accessibility attributes while maintaining existing functionality
• Introduced localized aria-label using esc_attr__() for internationalization support

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