feat: Add `doNotActivate` parameter to `NavigateAsync` method from Navigation Extensions

[xperiandri]

GitHub Issue (If applicable): closes #2381

PR Type

What kind of change does this PR introduce?

• Feature

What is the current behavior?

Window is always activated as soon as possible

What is the new behavior?

Window is activated either as soon as possible or right after the host is started (all hosted services completed)

PR Checklist

Please check if your PR fulfills the following requirements:

• [X] Tested code with current supported SDKs
• [ ] Docs have been added/updated which fit documentation template. (for bug fixes / features)
• [ ] Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• [ ] Wasm UI Tests are not showing unexpected any differences. Validate PR Screenshots Compare Test Run results.
• [X] Contains NO breaking changes
• [ ] Updated the Release Notes
• [X] Associated with an issue (GitHub or internal)