Adopt/Implement the OpCreds Fabrics management commands in the python chip tool

[shana-apple]

The OperationalCredentials cluster now has some commands:

• RemoveFabric (not completely up to spec)
• Read Fabrics list
• RemoveAllFabrics (acts as a reset of the accessory, not approved to be in the spec, up for discussion).

These commands have been added to the iOS chiptool, it would be good to add functionality to the python chip tool.

[shana-apple]

@andy31415 who could this be assigned to?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[stale]

This stale issue has been automatically closed. Thank you for your contributions.