Add a `submit` subcommand to `cocli`

[thomas-fossati]

Add a submit sub-command to corim command in cocli that uses veraison/apiclient to supply a CoRIM to the provisioning interface of the verifier.

Something like:

cocli corim submit \
    --corim-file <CoRIM file> \
    --api-server <URI of the endorsement API server> \
    --media-type <media type associated with CoRIM file>