http2: add failing writes with destroy test
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines
Simplified the failing http2 test from #19828 into this test case. Basically when doing lots of writes and then destroying the request, the process will hang instead of exiting normally.