Make neutron-tempest-plugin-dynamic-routing job non-voting

* neutron-tempest-plugin-dynamic-routing: this is affected by the
  eventlet removal process in Neutron repository.
* neutron-tempest-plugin-dynamic-routing-2024-1: this is affected
  too by the commented removal but because is incorrectly installing
  the master branch. All 2024.1 jobs will be removed in a follow up
  patch.

Related-Bug: #2130631

Signed-off-by: Rodolfo Alonso Hernandez <ralonsoh@redhat.com>
Change-Id: I873d619442ddf5bc102a1508dcaa290a912d741d
2 files changed