rework time interfaces to avoid using sinon types

[davidjgoss]

🤔 What's changed?

Rework time interfaces to avoid using sinon types in production code.

⚡️ What's your motivation?

Fixes #2141. We shouldn't have a non-dev dependency, explicit or otherwise, on a test library's types.

🏷️ What kind of change is this?

• 🐛 Bug fix (non-breaking change which fixes a defect)

📋 Checklist:

• I agree to respect and uphold the Cucumber Community Code of Conduct
• I've changed the behaviour of the code
  • I have added/updated tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• Users should know about my change
  • I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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[coveralls]

Coverage remained the same at 98.253% when pulling 6d073e6 on fix/time-types-exposure into 1a3828d on main.