PSR-52: Adding tests

[Abutalif]

Purpose

Adding tests for the Serialize Class implementation for Query Token Types.

Changes

• Added Property tests inside TokenSpec.hs for query token types;
• Added Spec tests inside TokenSpec.hs for query token types that match their Rust counterpart;
• Added generators for query token types in Generator.hs;

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.

CLA acceptance

_Remove if not applicable.

By submitting the contribution I accept the terms and conditions of the
Contributor License Agreement v1.0

• link: https://developers.concordium.com/CLAs/Contributor-License-Agreement-v1.0.pdf

• I accept the above linked CLA.