http2: pass session to DEBUG_HTTP2SESSION2

When configure with --debug-http2 --debug-nghttp2 the following
compilation error is generated:

DEBUG_HTTP2SESSION2(this, "fatal error receiving data: %d", ret);
                          ^
../src/node_http2.cc:1690:27:
error: invalid use of 'this' outside of a non-static member function

1 errors generated.

OnStreamReadImpl is static and I think the intention was to pass in the
session variable here.

PR-URL: https://github.com/nodejs/node/pull/20815
Refs: https://github.com/nodejs/node/issues/20806


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>