Manager API: Remove deprecated navigateToSettingsPage method

[yannbf]

Closes #25369

What I did

The navigateToSettingsPage method from manager-api is now removed in favor of changeSettingsTab.

export const Component = () => {
  const api = useStorybookApi();

  const someHandler = () => {
    // Old method: api.navigateToSettingsPage('/settings/about');
    api.changeSettingsTab('about'); // the /settings path is not necessary anymore
  };

  // ...
}

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
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Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

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  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
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  • cleanup: Minor cleanup style change. Will not show up in release changelog.
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  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
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