Nginx-Ingress - Provide possibility to disable everything at root level - with corresponding possibility to enable at path level

[kylehodgetts]

Changes

Ambassador

Move path disabled checkout outside of the sub options look up. If a path has no kusk settings and thus enabled by default, kusk would skip it and not include it in the generated resources. This commit fixes this

Nginx-Ingress

Support disabled option resolution using the semantics where lower level disabled settings (Path > Global) take precendence. This is not implemented for operations as the nginx-ingress generator doesn't support operation level settings

Checklist

• [x] tested locally
• [ ] added new dependencies
• [ ] updated the docs
• [x] added a test