feat(ansible): add gpu_https_port variable for configurable GPU node TLS port
Add gpu_https_port variable (default 443, override to 444 for itu_rtx_gpu_api on 10.0.0.110).
Changes:
- group_vars/all.yml: add gpu_https_port default
- group_vars/itu_rtx_gpu_api/vars.yml: override to 444
- group_vars/cloud_deploy/vars.yml: override to 444
- templates/docker-compose.gpu.yaml.j2: variable port mapping
- templates/env.j2: include port in GPU endpoint URLs
- deploy-gpu.yml: variable port in smoke tests + replace ipaddr filter with regex
- docker-compose.gpu.yaml: env var port mapping
- docs: update GPU port references