fix(indexing): use encrypted tmpDBs for index building if encryption …

…is enabled (#6828) (#7343)

If the encryption is enabled for cluster, we should enable encryption for temporary DBs used for reindexing.This PR adds that encryption option for temporary DBs,

(cherry picked from commit 31164dd)

posting/index.go

@@ -574,6 +574,7 @@ func (r *rebuilder) Run(ctx context.Context) error {
 		WithNumVersionsToKeep(math.MaxInt32).
 		WithLogger(&x.ToGlog{}).
 		WithCompression(options.None).
+		WithEncryptionKey(x.WorkerConfig.EncryptionKey).
 		WithLoggingLevel(badger.WARNING)
 
 	// Set cache if we have encryption.