Wallet Attestation in the presentation response

[peppelinux]

According to Torsten's Advanced Flow and agreements with the collegues we have decided to not provide the wallet metadata within the wallet instance attestation but using an application/json with HTTP POST to the request_uri endpoint and, at the same time to provide the Wallet Attestation within the vp_token (array), together with the presented digital credential.

the section relying party solution should add a section/box with the the description of this and its rationale.