[JetStream] Migrate the bringIntoViewIfChildrenAreFocused modifier from composed function to Modifier.Node

[chikoski]

• The bringIntoViewIfChildrenAreFocused modifier uses composed function.
• The composed function causes the whole modifier chain to be re-composed every time.
• The bringIntoViewIfChildrenAreFocused modifier should switch its implementation to Modifer.Node for better performance.