chore: clean up deps and fix cypress

[grothem]

General Changes

• Removed gelato dependency since relayer wasn't being used anymore
• Refactored cypress test setup to just use fetch and removed axios dependency
• Fixed broken cypress tests and did some overall cleanup of test setup
• Removed jest tests and related dependencies since these were outdated and not being maintained

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Reviewer Checklist

Please ensure you, as the reviewer(s), have gone through this checklist to ensure that the code changes are ready to ship safely and to help mitigate any downstream issues that may occur.

• [ ] End-to-end tests are passing without any errors
• [ ] Code changes do not significantly increase the application bundle size
• [ ] If there are new 3rd-party packages, they do not introduce potential security threats
• [ ] If there are new environment variables being added, they have been added to the .env.example file as well as the pertinant .github/actions/* files
• [ ] There are no CI changes, or they have been approved by the DevOps and Engineering team(s)