lib: directly pass in the arguments

This removes some arguments usage and instead passes in the arguments directly.

It also improves the performance by using util._extends instead of Object.assign and by adding fast paths.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

child_process, http