Adjust documentation for 6.10 active components

[tinova]

Legacy Mode:

• ruby sunstone
• vcenter driver

Full removal:

• lxd
• firecracker
• turnkey linux
• dockerhub marketplace
• docker registry marketplace
• docker-machine

Progress Status

• [ ] Code committed
• [ ] Testing - QA
• [ ] Documentation (Release notes - resolved issues, compatibility, known issues)