Split CI jobs into test-code and test-container

[mathieu-benoit]

Split CI jobs into test-code and test-container and skip the test-container if from a fork for now.

[github-actions]

Overview

Image reference	score-compose:latest	score-compose:latest
- digest	19b8b49575af	19b8b49575af
- tag	latest	latest
- provenance	a1c3917	df7abf7
- vulnerabilities
- platform	linux/amd64	linux/amd64
- size	6.1 MB	6.1 MB
- packages	54	54

Policies (0 improved, 0 worsened)

Policy Name	score-compose:latest	score-compose:latest	Change	Standing
Default non-root user	✅	✅		No Change
No AGPL v3 licenses	✅	✅		No Change
No fixable critical or high vulnerabilities	✅	✅		No Change
No high-profile vulnerabilities	✅	✅		No Change
No outdated base images	✅	✅		No Change
No unapproved base images	✅	✅		No Change
Supply chain attestations	✅	✅		No Change