List token capabilities using token accessor with the CLI

[mattias-fjellstrom]

Is your feature request related to a problem? Please describe.
Currently there is no support to list the capabilities for a token using its accessor with the CLI. This requires you to use the actual token value.

Describe the solution you'd like
I want to be able to run vault token capabilities -accessor <accessor value> /the/path to see the capabilities on the path /the/path for the token with accessor <accessor value>.

Describe alternatives you've considered
There is an API-endpoint for this, so using the API directly is an alternative.

Explain any additional use-cases
N/A

Additional context
N/A