feat: Remove fixed IP assignment

Avoids error that the IP has already been assigned while trying multiple
proxy deploys

.gitlab-ci.yml

@@ -159,7 +159,6 @@ deploy_http_proxy_node:
     - >
       export HTTP_PROXY_INSTANCE_PORT=$(openstack port create
       -c id -f value --network $INTERNALNET
-      --fixed-ip subnet=$INTERNALNET_SN,ip-address=$INTERNALNET_IP
       --disable-port-security
       ${HTTP_PROXY_INSTANCE_NAME}_internal_port)
     - >
@@ -208,7 +207,6 @@ deploy_ssh_proxy_node:
     - >
       export SSH_PROXY_INSTANCE_PORT=$(openstack port create
       -c id -f value --network $INTERNALNET
-      --fixed-ip subnet=$INTERNALNET_SN,ip-address=$INTERNALNET_IP
       --disable-port-security
       ${SSH_PROXY_INSTANCE_NAME}_internal_port)
     - >