Attestation on Get Assertion

[timcappalli]

Topic from June F2F meeting

With the changing security properties of WebAuthn credentials, we need to re-evaluate the need for an RP to request attestation during a Get Assertion.

[timcappalli]

2022-06-09 - during F2F, general consensus that allowing this at the spec level is a good idea.

[sbweeden]

@agl suggested this would be covered in the DPK PR

[nicksteele]

Is this being covered specifically in regards to DPK or for other credentials as well? I'd prefer the latter.

[agl]

Done in the DPK changes.

[nicksteele]

Done

[emlun]

Fixed in #1663.