[1.0] Commissioner attestation delegate should be able to override success

[jtung-apple]

Reproduction steps

The SDK currently allows an attestation delegate to override an attestation failure in response to user preference. The attestation delegate should also be able to override attestation success, in case application logic decides to stop commissioning a device.

Bug prevalence

N/A

GitHub hash of the SDK that was being used

0f0e1e9

Platform

darwin, core

Platform Version(s)

No response

Type

Platform Issue

Anything else?

why is this important

This is required for third party developers on iOS to verify device attestation.

what is the sideffect if we decide to not accept this change into 1.0 branch or if we fail to finish its development?

Once commissioning starts, third party developers would not be able to reject attestation results, even if they have more verification information