Change validVC fixture to vcdm 2.0

[PatStLouis]

No description provided.

[aljones15]

the better way to handle this is probably just to let each suite pass in a fixture, the verifier tests already allow this. As this is a breaking release I suppose we probably should do this here, but it might be better to make a fixtures/ dir with a vc 1.1 and vc 2.0 validVc.json file.

[PatStLouis]

OK, I will look into this

[aljones15]

just so this is known: the issuer suites now accept a credential parameter so that issuer and verifier tests can be run with both VC versions 1.1 and 2.0. However, we can definitely still use this PR as it could provide both a 1.1 and 2.0 credential for other suites to use.

TODO:

• export both VC 1.1 and VC 2.0 credentials
• use those credentials in other suites that just require a basic VC test
• optionally the valid VC could be updated to have something in the credential subject using an inline context (see the test fixtures for an example or the ecdsa-sd-2023 tests for examples)