test: improving crypto fips

- using strictEqual instead equal
- cast `response` to Number()

PR-URL: https://github.com/nodejs/node/pull/10002


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>