Remove requirement for atomic quotes and improve validation architecture

[THS-on]

Enhancement Description

• One-line enhancement description (can be used as a release note): Removal the requirement for atomic quotes (PCR values must match quote hash) and improvements to the validation architecture
• Recommended skills: Python, Interest in TPMs
• Keylime Enhancement Proposal: follows shortly
• Primary contact (assignee): Thore Sommer (@THS-on )

An overview of the issue and potential fixes can be found here: https://gist.github.com/THS-on/4229ba2c8c83dc5d9726a6c62c932868

This is a potential idea for GSoC: https://github.com/cncf/mentoring/blob/main/summerofcode/2022.md