http: onFinish will not be triggered again when finished

[rickyes]

When the .end() is called with the payload again after the end, directly return and pass the ERR_STREAM_WRITE_AFTER_END error to the callback and error event.

Fixes: #35833

/cc @ronag @kaizhu256

Checklist

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