Don't close real process stdio in stdio_server (#1933) #3461

Job	Run time
checks / pre-commit	44s
checks / readme-snippets	12s
checks / docs	35s
checks / test (3.10, locked, ubuntu-latest)	1m 26s
checks / test (3.10, locked, windows-latest)	2m 16s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 20s
checks / test (3.11, lowest-direct, windows-latest)	2m 29s
checks / test (3.11, locked, windows-latest)	2m 6s
checks / test (3.11, locked, ubuntu-latest)	1m 5s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 20s
checks / test (3.10, lowest-direct, windows-latest)	1m 38s
checks / test (3.13, locked, windows-latest)	1m 56s
checks / test (3.12, locked, ubuntu-latest)	1m 42s
checks / test (3.12, locked, windows-latest)	1m 56s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.14, lowest-direct, windows-latest)	2m 28s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.14, locked, windows-latest)	2m 39s
checks / test (3.13, locked, ubuntu-latest)	1m 19s
checks / test (3.14, locked, ubuntu-latest)	1m 16s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 26s
checks / test (3.13, lowest-direct, windows-latest)	2m 1s
checks / test (3.12, lowest-direct, windows-latest)	1m 57s
all-green	3s
	36m 14s

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