test: refactor test-http-information-processing

Replace magic numbers with constant.
Use for loop for repeated code.
Reduce console logging.
Remove unneeded countdown module use.

PR-URL: https://github.com/nodejs/node/pull/32547


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>