Add `force`, `noprune` option to `PurgeImages` GQL API

## Motivation  

- When the administrator runs "purge images," there may be cases where certain options need to be used.

## Required Features

- The `purge images` CLI command and GQL arguments will include the `force` and `noprune` options.

## Impact  

- The administrator will be able to modify these options when running the `purge images` command.

## Testing Scenarios  

- For example, when calling `purge images` on an image that is currently in use, an error occurs because the default value of the `force` option is `False`, preventing the image from being deleted.
Check that when the `force` option is set to `True`, the error does not occur and the in-use image is deleted immediately.

JIRA Issue: BA-820

Locate the `purge images` CLI entry point and the `PurgeImages` GQL API definition, then trace how their arguments are handled and where related tests live. Add support for `force` and `noprune` in both interfaces, and verify that enabling `force` permits deletion of an in-use image without an error.

Written by the indexing model from the issue text.