Clarify KV 2 API docs (#12086)
Clarify KV 2 API docs (#12086)

* initial draft of changes

* address pr comments and add changelog

* remove changelog
hashicorp/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault,rnaveiras/vault,hashicorp/vault,rnaveiras/vault,hashicorp/vault,rnaveiras/vault,rnaveiras/vault,rnaveiras/vault