Symorton/issuance cancel method

[symorton]

• Add Issuance Callback logic to VerifiedIdIssuanceRequest. We will automatically call the issuance callback during complete for a success of failure. For the cancel method on the VerifiedIdIssuanceRequest, we will call the issuance callback with error message of "user canceled" because that is the only one Client API supports for canceled flows.
• We need to get the state and the callback url from the PresentationRequest and inject it into the IssuanceRequest like we do for InjectedIdToken.
• Added test cases for all of the above.

[nithyaganeshng]

Could you implement the same for issuance request fetch as well?