Refactor CI/CD pipeline to include workflow rules and retain only deploy jobs

• Removed all jobs except for deploy_ood_proxy_node and deploy_ssh_proxy_node
• Added workflow rules to trigger pipeline based on source (web, schedule, manual)
• Updated scripts and environment variables for the remaining jobs

.gitlab-ci.yml

@@ -46,7 +46,6 @@ deploy_ood_proxy_node:
       -c id -f value --image $PROXY_OOD_IMAGE_ID
       --network $OOD_PROXY_NETWORK
       --security-group ood-https-ports
-      --security-group node-exporter
       --security-group allow-ssh
       --user-data user_data.txt
       --flavor $INSTANCE_FLAVOR
@@ -78,7 +77,6 @@ deploy_ssh_proxy_node:
       -c id -f value --image $PROXY_SSH_IMAGE_ID
       --network $OOD_PROXY_NETWORK
       --security-group ood-https-ports
-      --security-group node-exporter
       --security-group allow-ssh
       --user-data user_data.txt
       --flavor $INSTANCE_FLAVOR