New CLI prompt to use Update Plans

Pulumi has introduced an experimental feature called Update Plans to provide users with a strong guarantee about changes made to their infrastructure, especially in critical and production environments. This feature, available in the Pulumi CLI version 3.48.0, allows users to save results from a pulumi preview to a plan file, ensuring that subsequent updates adhere strictly to the actions specified in the plan. Initially requiring the use of specific CLI commands and an experimental environment variable, Update Plans are now more accessible through a new option in the interactive update confirmation prompt, which aligns with typical user habits. Users can now choose to execute an update using Update Plans during interactive sessions, and any discrepancies between the preview and the update will be reported. Although in public preview and recommended for non-critical scenarios, Pulumi encourages users to try the feature and provide feedback through their community channels.