stream: eos more accurate writable and readable detection

The value of stream.readable and stream.writable should not be used to detect whether a stream is Writable or Readable.

Refs: #29395 (closed)

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