test: refactor test-net-server-bind

• Use common.mustNotCall() and common.mustCall() as appropriate
• Use block scoping
• Move assertions out of exit handler and into callbacks
• Order assert.strictEqual() args per docs
• Remove console.log() calls
• Move test from parallel to sequential so common.PORT can be used without conflicting with OS-provided ports in other parallel tests

Checklist

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

Affected core subsystem(s)

test net