fix: make logError aware of bytesWritten

[rvagg]

Comes from noting this in logs:

Sep 09 14:01:16 fletcher frisbii[2505007]: 2023/09/09 14:01:16 http: superfluous response.WriteHeader call from github.com/ipld/frisbii.(*LoggingResponseWriter).WriteHeader (logmiddlware.go:105)

which I believe comes from the StreamCar error going through to logError which writes a header regardless of what has happened; this pulls the bytesWrittenCh logic into logError and makes it the place that handles bytesWritten or noBytesWritten states, including unclean termination if necessary.