Merge "Revert "Make debian-bullseye job non-voting""

Author: Zuul

.zuul.yaml

@@ -678,8 +678,6 @@
     description: Debian Bullseye platform test
     nodeset: devstack-single-node-debian-bullseye
     timeout: 9000
-    # TODO(danms) n-v until the known issue is resolved
-    voting: false
     vars:
       configure_swap_size: 4096