Clarify whether "token" parameter should be the accessor or secret ID

Per https://github.com/hashicorp/consul/issues/4478#issuecomment-586741457, some areas of the documentation mention specifying an ACL token, but don't specify whether `AccessorID` or `SecretID` is needed.

We should be consistently explicit about whether `AccessorID` or `SecretID` is needed, including in:
- CLI docs
- HTTP API docs
- CLI command help within the `consul` binary

Review the CLI docs, HTTP API docs, and command help within the consul binary, focusing on references to ACL tokens. Make each reference explicit about whether AccessorID or SecretID is required, and confirm that the three listed areas use consistent terminology.

Written by the indexing model from the issue text.