fix: add the type definition for cy.writeFile with 4 arguments.

[sainthkh]

• Closes cy.writeFile type does not have 4 argument version #15353

User facing changelog

Add the type definition for cy.writeFile with 4 arguments.

Additional details

• Why was this change necessary? => 4 argument definition is valid, but it doesn't exist.
• What is affected by this change? => N/A
• Any implementation details to explain? => N/A

How has the user experience changed?

N/A

PR Tasks

• Have tests been added/updated?

[cypress-bot]

Thanks for taking the time to open a PR!

• Create a Draft Pull Request if your PR is not ready for review. Mark the PR as Ready for Review when you're ready for a Cypress team member to review the PR.
• Become familiar with the Code Review Checklist for guidelines on coding standards and what needs to be done before a PR can be merged.

[sainthkh]

flaky failures.