Provide API to remove connection to a Git repository from an inventory folder

Current Situation

Currently the JS7 Rest API offers API requests to connect a folder to a Git repository, to transfer objects between the Git repository and a single JOC Cockpit instance. However there is no way to remove the connection from the folder.

Desired Behavior

A user should be able to remove a connection to a Git repository from an inventory folder. The user can decide if the locally checked out Git repository should be removed too (default: false).