http2: update handling of rst_stream with error code NGHTTP2_CANCEL

The PR updates the handling of rst_stream frames and adds all streams
to the pending list on receiving rst frames with the error code
NGHTTP2_CANCEL.

The changes will remove dependency on the stream state that may allow
bypassing the checks in certain cases. I think a better solution is to
delay streams in all cases if rst_stream is received for the cancel
events.

The rst_stream frames can be received for protocol/connection error as
well it should be handled immediately. Adding streams to the pending
list in such cases may cause errors.

PR-URL: https://github.com/nodejs/node/pull/39622
Refs: https://github.com/nodejs/node/pull/39423


Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Beth Griggs <bgriggs@redhat.com>