Provide option to delete previous manifests

[Trenly]

Description of the new feature/enhancement

Provide the option to or automatically remove previous manifests if either

• The URL's for the new version are the same as the previous version
• The previous version URL's return 404's

Proposed technical implementation details (optional)

• Before we begin the work on this; We need to understand how wingetbot handles this, as well as how to properly create the PR's so that they are correctly processed in the pipeline

[vedantmgoyal9]

Isn't it already done?

[Trenly]

No, not completely