feat(TKC-3022): add cone: true flag for content.files

[rangoo94]

Pull request description

kind: TestWorkflow
apiVersion: testworkflows.testkube.io/v1
metadata:
  name: cone-example
spec:
  content:
    git:
      uri: https://github.com/kubeshop/testkube
      cone: true
      paths:
      - choco/tools

Checklist (choose whats happened)

• breaking change! (describe)
• tested locally
• tested on cluster
• added new dependencies
• updated the docs
• added a test