[#4009] Update samples to support latest Node version - TypeScript

[ceciliaavila]

Addresses # 4009

Description

This PR updates the ARM templates of the TypeScript samples to use Node 20 as default.

Proposed Changes

• Updated Node to version 20 in all ARM templates.
• Upgraded the restify dependency to version 10.0.0 and the @types/restify to 8.5.12.
• Fixed error with missing moment module in 13.core-bot sample.
• Fixed missing 'next' parameter in '/api/messages' handler to comply with new restify's requirements.
• Updated Node required version in README files.

Testing

These images show the resources created in Azure and a bot working after the deployment.

[ceciliaavila]

I think that the README file would require to change the node version used to test.

mmm.... yes, maybe we could use node 18 or greater.

[ceciliaavila]

/promoted 4011