lib: fix nits in lib\internal\bootstrap\node.js

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

• Fix typos and unify differences in comments and messages.
• Unwrap short lines.
• Eliminate short-living variables.
• Fix sorting in an array of strings.
• Unify iteration over arrays of strings.
• Reduce string concatenation.
• Cache retrieved object/array properties.
• Simplify conditional logic.
• Reduce module loading calls if at least one of them isn't conditional: internalBinding('config'), internalBinding('worker'), NativeModule.require('internal/util'), NativeModule.require('util').