Feature/add mtls cert binds

[maheshshekhar]

Description

Added Mtls certificate binding for cloudflare workers

Has your change been tested?

Yes, The code change has been tested locally.

Screenshots (if appropriate):

Types of changes

What sort of change does your code introduce/modify?

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.
• [ ] This change is using publicly documented in cloudflare/api-schemas and relies on stable APIs.