BUG/MINOR: h3: reject RESET_STREAM received for control stream

BUG/MINOR: h3: reject RESET_STREAM received for control stream

This commit is similar to the previous one. It reports an error if a
RESET_STREAM is received for the remote control stream. This will
generate a CONNECTION_CLOSE with H3_CLOSED_CRITICAL_STREAM error.

Note that contrary to the previous bug related to STOP_SENDING, this bug
was not encountered in real environment. As such, it is labelled as
MINOR. However, it could triggered the same crash as the previous patch.

This should be backported up to 2.6.