Feature: Update Provisioning Plugin to handle CCA Platform Endorsements

[yogeshbdeshpande]

Define New Profile to handle CCA Platform Endorsement.

Handle CCA Platform Endorsements by extending the PSA plugin

[yogeshbdeshpande]

Phase -1 : Extend PSA Decoder to decode CCA claims.

Phase-2: Extend the Back End and Proto Interface to handle CCA Endorsements.

[yogeshbdeshpande]

Phase 1 Tasks:

(a) Define a CoRIM Profile for Provisioning CCA Platform Endorsements.
(b) Handle decoding of new CCA Platform Endorsements re-using PSA CoRIM Plugin
(c) Decode CoRIM Profile in the common decoder code.
(d) Write tests to cover the newly added functionality!

Phase - 1 Tasks are Handled via PR #56

[yogeshbdeshpande]

Phase 2 Tasks:
Modify interface between Provisioning and VTS (vts.proto) for the following
-> Rename AddSoftwareComponent() to AddReferenceValue()
-> Modify the Endorsement Store Interface to have "sub_type" key in the attributes. This is to distinguish the type of Reference Value: Example CCA or PSA SW Measurements or CCA Platform Config
--> Define new attributes for CCA Namespace(example cca.impld) When the CoRIM Profile is for CCA

[yogeshbdeshpande]

#91
Addresses Phase 2 tasks

Hence closing this issue