http: do not default to chunked encoding for TRACE

Fixes: https://github.com/nodejs/node/issues/25783

PR-URL: https://github.com/nodejs/node/pull/27673


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>