Add delete test

[sou1118]

Description

Added integration tests for the container delete operation to verify Youki's behavior in various container states. The tests check four scenarios:

1. Deleting a non-existent container (fails as expected)
2. Deleting a container in "created" state (succeeds as expected)
3. Deleting a container in "running" state (fails as expected)
4. Deleting a container in "stopped" state (succeeds as expected)

These tests improve our coverage of container lifecycle operations and ensure consistent behavior across Youki releases.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test updates
• CI/CD related changes
• Other (please describe):

Testing

• Added new unit tests
• Added new integration tests
• Ran existing test suite
• Tested manually (ran the new tests using the test framework)

Related Issues

#361

Additional Context

The tests verify that Youki properly handles container deletion across different container states. Each test includes appropriate cleanup steps to ensure no resources are left behind after test execution.

[YJDoc2]

Hey, can you rebase on main? I think that will fix the failing CI.

[sou1118]

Hi! I did rebase on main!