Verify `attributes` and `miscselectMask` of the quoting enclave

[Niederb]

• The two attributes of the quoting enclave must be compared against the registered quoting enclave
  • A binary mask must be applied first before comparing
  • All the data is already there
• See here: https://api.portal.trustedservices.intel.com/documentation#pcs-enclave-identity-v4
  • Steps 2c and 2d

[clangenb]

From the code I assume that we don't preform this check yet?

[Niederb]

Yes, this is not implemented yet. I did this on purpose because I thought it can be a good first issue for someone else to get into the code.