http2: force through RST_STREAM in destroy

If still needed, force through RST_STREAM in Http2Stream#destroy
calls, so that nghttp2 can wrap up properly and doesn't continue
trying to read & write data to the stream.

Backport-PR-URL: https://github.com/nodejs/node/pull/22850
PR-URL: https://github.com/nodejs/node/pull/21016
Fixes: https://github.com/nodejs/node/issues/21008


Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>