add support for CMW evidence format - agent side

[HarshvMahawar]

Server side - https://github.com/keylime/keylime/pull/1777

Concise Summary

Support CMW-based evidence serving instead of custom quote format

This PR adds initial support for sending attestation evidence encoded using the Conceptual Message Wrapper (CMW), as prescribed by the IETF draft. It introduces encoding logic and also introduced an api-version v2.4 (subject to approval) to serve the CMW

e.g.

curl -vk --cert /var/lib/keylime/cv_ca/client-cert.crt --key /var/lib/keylime/cv_ca/client-private.pem "https://localhost:9002/v2.4/quotes/integrity?nonce=1234567890ABCDEF&mask=0x10401&partial=0" | jq

[codecov[bot]]

Codecov Report

:x: Patch coverage is 84.77509% with 44 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 58.41%. Comparing base (d7003ab) to head (f13aceb).

Files with missing lines	Patch %	Lines
keylime/src/cmw.rs	82.20%	42 Missing :warning:
keylime-agent/src/quotes_handler.rs	96.07%	2 Missing :warning:

Additional details and impacted files

Flag	Coverage Δ
e2e-testsuite	58.41% <84.77%> (-0.49%)	:arrow_down:
upstream-unit-tests	58.41% <84.77%> (-0.49%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
keylime-agent/src/api.rs	81.01% <100.00%> (+0.49%)	:arrow_up:
keylime/src/config/base.rs	87.08% <ø> (ø)
keylime-agent/src/quotes_handler.rs	68.50% <96.07%> (+6.92%)	:arrow_up:
keylime/src/cmw.rs	82.20% <82.20%> (ø)

... and 11 files with indirect coverage changes

:rocket: New features to boost your workflow:

• :snowflake: Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[THS-on]

@HarshvMahawar make sure that all the test pass.

@ansasaki can you have a look?