api/tape/inventory: optionally try to restore catalogs

api/tape/inventory: optionally try to restore catalogs

in a disaster recovery case, it is useful to not only re-invetorize
the labels + media-sets, but also to try to recover the catalogs
from the tape (to know whats on there). This adds an option to
the inventory api call that tries to do a fast catalog restore
from each tape to be inventorized.

also sets the correct default for 'read-all-labels' in the api and
converts to a bool

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>