fix: add container test target reference support [CN-71]

[aarlaud]

Pull Request Submission Checklist

• Follows CONTRIBUTING guidelines
• Includes detailed description of changes
• Contains risk assessment (Low | Medium | High)
• Highlights breaking API changes (if applicable)
• Links to automated tests covering new functionality
• Includes manual testing instructions (if necessary)
• Updates relevant GitBook documentation (PR link: ___)
• Includes product update to be announced in the next stable release notes

What does this PR do?

Adds test cases for the target ref support in container monitor and test, following support addition in the snyk-docker-plugin snyk/snyk-docker-plugin#649.

Where should the reviewer start?

This change mainly bumps the docker plugin to 7.0.1 and add tests for the newly added target reference support in snyk container test.

How should this be manually tested?

Running snyk container test <IMAGE> --target-reference=<VALUE> should send a payload containing the target reference in the scanResult object sent to /test-dependencies endpoint.

What's the product update that needs to be communicated to CLI users?

The product update is deferred to a later time. This change currently requires a FF in the platform to be effective.
While the plan is for a wider rollout, we're taking extra precautions to validate that no one is relying on the "erroneous" behavior.

Behavior that could cause a change is a particular combination of circumstances:

• snyk container monitored projects with target reference (currently supported).
• snyk container test with target reference (currently not supported, but some users might have implemented it regardless). In that case, the change would possibly change results if particular ignores are associated to that target reference AND are different than the ignores for no target reference.
  We're extracting data to confirm no one fit this particular scenario and will reach out to individual cases if any to notify them of the upcoming change.

What are the relevant tickets?

https://snyksec.atlassian.net/browse/CN-71

[github-actions]

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⚠️	"Merge branch 'main' into fix/CN-71-add-target-reference-support-for-cli-snyk-container-test" is too long. Keep the first line of your commit message under 72 characters.

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