test: using arrow functions

    - Using arrow functions in test-tls-client-resume.js
    - Fixed error, Expected parentheses around arrow function
      argument arrow-parens

PR-URL: https://github.com/nodejs/node/pull/24436


Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>