Merge branch 'credential-proof-tests' into 'main'

src/main/resources/REST/json/Credential.json

src/main/resources/REST/json/Presentation.json

...es/REST/schemas/Signer_CredentialProof_alumni_schema.json

...resources/REST/schemas/Signer_CredentialProof_schema.json

...EST/schemas/Signer_CredentialProof_without_ID_schema.json

.../java/api/test/rest/tsa/signer/SignerStepDefinitions.java

...rces/features/tsa/signer/v1/credential/proof/POST.feature

...ces/features/tsa/signer/v1/credential/verify/POST.feature

...es/features/tsa/signer/v1/presentation/proof/POST.feature

...s/features/tsa/signer/v1/presentation/verify/POST.feature