requesthandler: Add Compare and Assert

[tt2468]

Description

Usable for performing some basic logic functions. Not feature-complete.

Motivation and Context

Request batches have limited functionality due to lack of logic and variable mutations. This attempts to introduce a bit of this functionality.

Alternative suggested implementation: #1112

How Has This Been Tested?

Tested OS(s): Ubuntu 22.04

Types of changes

• New request/event (non-breaking)
• Documentation change (a change to documentation pages)

Checklist:

• I have read the Contributing Guidelines.
• All commit messages are properly formatted and commits squashed where appropriate.
• My code is not on master or a release/* branch.
• The code has been tested.
• I have included updates to all appropriate documentation.