Parsing issues and SELinux permission issues while building ironic images

[abhibongale]

three issues:

1. JSON Parsing (stackbox/core/compose.py:294-308):

• podman-compose returns JSON array: [{...}, {...}]
• Docker Compose v2 returns JSONL: {...}\n{...}
• Added detection logic to handle both formats

2. Health Status Parsing (stackbox/core/compose.py:314-333):

• Docker Compose v2: has "Health" field directly
• podman-compose: embeds health in "Status" field like "Up 3 minutes (healthy)"
• Added regex parsing to extract health from Status string

3. SELinux Permission for Sushy (docker-compose.yml.j2:74):

• Added :Z flag to sushy config volume mount