http2: adjust error emit in core, add tests

Use the ability of nextTick and setImmediate to pass arguments
instead of creating closures or binding. Add tests that cover
the vast majority of error emits.

PR-URL: https://github.com/nodejs/node/pull/15586


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>