DPL-936-5: The Great Rubocop Linting

[StephenHulme]

Closes #4087

Changes proposed in this pull request

• All the linting

Instructions for Reviewers

[All PRs] - Confirm PR template filled
[Feature Branches] - Review code
[Production Merges to main]
    - Check story numbers included
    - Check for debug code
    - Check version