heartbeat: keep the master current through collection churn (#10657)

* heartbeat: name departed volumes in delta heartbeats

* master: release the lookup index with a deleted collection

* master: keep a fresh grow safe from the report that raced it

* volume: name the volumes a deleted collection took with it

Deleting a collection left the master to work out what went by omission from
the next full volume list, which it no longer gets: heartbeats carry the whole
list only when the master asks for it. The volumes a bucket's churn creates and
destroys between two of those requests are never named in either direction, so
the master keeps counting their slots as occupied and a cluster that creates
and drops collections quickly runs its free-slot accounting dry -- assigns fail
with no free volumes left while the disk holds a handful of volumes.

The destroy path already knows exactly which volumes it removed, so send them
down the same channel every other deletion uses.

* rust: name the volumes a deleted collection took with it

Mirrors the Go volume server. The notify path derives its deltas by diffing
snapshots, so a collection delete that does not wake it is invisible until the
master next asks for the whole list.

weed/topology/collection.go

@@ -75,6 +75,9 @@ func (c *Collection) DeleteVolumeLayout(rp *super_block.ReplicaPlacement, ttl *n
 	if diskType != types.HardDriveType {
 		keyString += string(diskType)
 	}
+	if vl, found := c.GetVolumeLayout(rp, ttl, diskType); found {
+		vl.releaseLookupOwnership()
+	}
 	c.storageType2VolumeLayout.Delete(keyString)
 }