Update Status Colors to latest Fluent 2 guidance

[philworthington]

Platforms Impacted

• iOS
• visionOS
• macOS

Description of changes

A recent audit of the Fluent 2 iOS Toolkit which references tokens in Fluent 2 design language shows updated status colors that differ from the current FluentUI implementation.

To access the tokens:

1. Duplicate to your drafts: Fluent 2 design language.
2. Select "Open variables" button in the right pane.
3. Use the top left dropdown to select "Mode: Mobile".
4. Scroll to and select "Status" in the left pane.

Verification

1. Build and run Demo.Development
2. Select NotificationView and select Danger Toast and Warning Toast.

Danger Toast: Red -> Cranberry colors
Warning Toast: Yellow -> DarkOrange colors

Visual Verification

Before	After

Pull request checklist

This PR has considered:

• Light and Dark appearances
• iOS supported versions (all major versions greater than or equal current target deployment version)
• VoiceOver and Keyboard Accessibility
• Internationalization and Right to Left layouts
• Different resolutions (1x, 2x, 3x)
• Size classes and window sizes (iPhone vs iPad, notched devices, multitasking, different window sizes, etc)
• iPad Pointer interaction
• SwiftUI consumption (validation or new demo scenarios needed)
• Objective-C exposure (provide it only if needed)

Microsoft Reviewers: Open in CodeFlow