[v12.x] http2: update handling of streams on rst_stream frames

[kumarak]

Backport ref PR #39622 and resolve merge conflict with
git cherry-pick

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/39473/

[richardlau]

Should I expect the testcase to fail on earlier versions of Node.js 12? When I test locally with 12.22.4 and without the http2 change in this PR the testcase passes.

[kumarak]

@richardlau, Ideally the test should verify the fixes but I was unable to reproduce the issue without grpc-js. The original issue scripts are here(repro-node-crash). I tried reproducing it with http2 streams.

So I simplified the test case and only checks the RST_STREAM frames getting sent with cancel error code, the stream is in the paused-reading state, and there is no issue with handling it(e.g: no endpoint hang, no stream close error). The behavior is same what it was previously and the test case passes with the older version as well.

[richardlau]

This went out in 12.22.5 in f2f7a45...9cd1f53.