Remove common.PORT usage from `parallel` tests

Refs: #12376 (closed)

Tests Updated:

• test/parallel/test-net-better-error-messages-port-hostname.js
• test/parallel/test-net-socket-destroy-twice.js
• test/parallel/test-net-options-lookup.js
• test/parallel/test-net-connect-immediate-destroy.js
• test/parallel/test-net-localerror.js
• test/parallel/test-net-connect-handle-econnrefused.js

Tests ported from test/parallel to test/sequential:

• test/sequential/test-net-listen-shared-ports.js
• test/sequential/test-net-better-error-messages-port.js

Analyzed and continuing to use common.PORT

• test/parallel/test-net-connect-immediate-finish.js

Checklist

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

Affected core subsystem(s)

test