api/quarantine: add safer endpoint for user white/blacklist address deletion

api/quarantine: add safer endpoint for user white/blacklist address deletion

having the entry as part of the url causes many problems since it can
contain special characters like '/.,' etc., and that can break API
call path-to-method resolution.

Passing it as parameter makes it easier for callers (frontends) and
safer for backend to use

Note that the new api calls overwrites the parameter pattern with '',
so no formatting limits for the entries

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
[ Thomas: improved commit message ]
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>