fix #6560: metrics: influxdb: do not send storage type as field too

The type of a storage is sent as a tag, but it is also part of the
storage status data and so sent as a field with the same name.
InfluxDB 3 does not allow this and rejects the whole write with:

 'type' is used as both a tag and a field

so no storage metrics end up in the database.

Exclude the type from the fields, like it is already done for the
VMID of guests since commit 456be471 ("fix #3440: influxdb: remove
duplicate vmid tag").

Signed-off-by: Michal Fox <me@dualfroz.com>

PVE/Status/InfluxDB.pm

@@ -150,7 +150,8 @@ sub update_storage_status {
     }
     $object =~ s/\s/\\ /g;
 
-    build_influxdb_payload($class, $txn, $data, $ctime, $object);
+    # type is already added in base $object above, so exclude it from being re-added
+    build_influxdb_payload($class, $txn, $data, $ctime, $object, { 'type' => 1 });
 }
 
 sub _send_batch_size {