Add `shutdown_socket()` function for follow up of #505 #3406

Job	Run time
unit-tests-multi / run (ubuntu-latest)	9s
unit-tests-multi / run (macos-latest)	1s
check-labels / check	2s
unit-tests-single / run (ubuntu-latest)	18s
unit-tests-single / run (macos-latest)	1s
build-rti / docker-build	10s
build-rti / native-build (ubuntu-latest)	5s
build-trace-tools / run (ubuntu-latest)	4s
build-rti / native-build (macos-latest)	1s
fetch-lf / extract-ref	2s
build-trace-tools / run (macos-latest)	1s
build-rti / native-build (windows-latest)	6s
build-trace-tools / run (windows-latest)	3s
lf-default-flexpret	0s
lf-default-zephyr	0s
lf-default-arduino	0s
lf-python	0s
lf-adaptive	0s
lf-gedf-np	0s
lf-default / regular-tests (ubuntu-latest)	1s
	1m 4s

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