fix: Speed up multi-object delete by taking bulk locks (#8974)

Change distributed locking to allow taking bulk locks
across objects, reduces usually 1000 calls to 1.

Also allows for situations where multiple clients sends
delete requests to objects with following names

```
{1,2,3,4,5}
```

```
{5,4,3,2,1}
```

will block and ensure that we do not fail the request
on each other.

pkg/dsync/rpc-client-interface.go

@@ -21,8 +21,8 @@ type LockArgs struct {
 	// Unique ID of lock/unlock request.
 	UID string
 
-	// Resource contains a entity to be locked/unlocked.
-	Resource string
+	// Resources contains single or multiple entries to be locked/unlocked.
+	Resources []string
 
 	// Source contains the line number, function and file name of the code
 	// on the client node that requested the lock.