Move grenade skip level jobs to wsgi

With [1] we can't deploy neutron with eventlet in
master and wsgi is default mode[2], so let's switch
grenade skip level jobs to deploy with wsgi.
Just dropped the overrides as parent grenade jobs have these
already set.

[1] https://review.opendev.org/c/openstack/devstack/+/932203
[2] https://review.opendev.org/c/openstack/devstack/+/932199
Topic: eventlet-deprecation
Related-Bug: #2069831

Change-Id: I2c52805a497d2c92168261a8cd4e964d708ca45c

zuul.d/grenade.yaml

@@ -412,16 +412,6 @@
       grenade_from_branch: stable/2024.2
       grenade_localrc:
         NOVA_ENABLE_UPGRADE_WORKAROUND: True
-      grenade_devstack_localrc:
-        shared:
-          NEUTRON_DEPLOY_MOD_WSGI: False
-      devstack_services:
-        # Neutron services
-        q-svc: true
-        neutron-api: false
-        neutron-rpc-server: false
-        neutron-periodic-workers: false
-        neutron-ovn-maintenance-worker: false
 
 - job:
     name: neutron-ovn-grenade-multinode-skip-level
@@ -438,12 +428,3 @@
       grenade_from_branch: stable/2024.2
       grenade_localrc:
         NOVA_ENABLE_UPGRADE_WORKAROUND: True
-      grenade_devstack_localrc:
-        shared:
-          NEUTRON_DEPLOY_MOD_WSGI: False
-      devstack_services:
-        q-svc: true
-        neutron-api: false
-        neutron-rpc-server: false
-        neutron-periodic-workers: false
-        neutron-ovn-maintenance-worker: false