Restore sndrcv behaviour from before 53afe84 #7175

Job	Run time
Build doc	6m 14s
CodeQL analysis	3m 16s
pyca/cryptography test	22s
Code health check	1m 8s
Type hints check	27s
Check SPDX identifiers	4s
ubuntu-latest 3.7 non_root -K scanner	8m 14s
ubuntu-latest 3.8 non_root -K scanner	8m 26s
ubuntu-latest 3.9 non_root -K scanner	8m 47s
ubuntu-latest 3.10 non_root -K scanner	8m 15s
ubuntu-latest 3.11 non_root -K scanner	8m 18s
ubuntu-latest 3.12 non_root -K scanner	9m 42s
ubuntu-latest 3.12 root -K scanner	11m 37s
ubuntu-latest pypy3.9 root -K scanner	11m 39s
ubuntu-latest libpcap 3.12 root -K scanner	11m 36s
macos-14 3.12 both -K scanner	11m 37s
ubuntu-latest 3.12 root -k scanner	11m 38s
ubuntu-latest pypy3.9 root -k scanner	11m 36s
macos-14 3.12 both -k scanner	11m 38s
	2h 24m 34s

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