http2: do not falsely emit 'aborted' on push
A push stream should have its writable side closed upon receipt, to avoid emitting the 'aborted' event when the readable side is closed.
(As far as I can tell this has been an issue as long as http2 has been around.)
Fixes: https://github.com/nodejs/node/issues/22851
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
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