Adding support for nodejs20

[NiketaPopatChaudhari]

What did you implement: Adding support for Nodejs 20

How can we verify it: Use it to deploy a nodejs20 function app to Azure.

Todos: Note: Run npm run test:ci to run all validation checks on proposed changes

Ensure there are no lint errors. Validate via npm run lint Note: Some reported issues can be automatically fixed by running npm run lint:fix

Validate via npm test

Is this ready for review?: YES Is it a breaking change?: NO