child_process: add 'overlapped' stdio flag
The 'overlapped' value sets the UV_OVERLAPPED_PIPE libuv flag in the child process stdio.
Fixes: https://github.com/nodejs/node/issues/29238
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests added -
documentation is changed or added -
commit message follows commit guidelines