Adding support for IDevID and IAK

[gustavobbrand]

Enhancement Description

• One-line enhancement description (can be used as a release note): Leverage the IDevID and IAK keys/certificates to register each device at the registrar service and enable attestation based on the IAK instead of using an ephemeral AK (Attestation key).
• Keylime Enhancement Proposal: Proposal 81: Adding support for IDevID and IAK #82
• Primary contact (assignee): @gustavobbrand
• Enhancement target (which target equals to which milestone):
  • Alpha release target (TBD)
  • Beta release target (TBD)
  • Stable release target (TBD)

Please to keep this description up to date.