Avoid re-connecting every Ctrl+C (bugfix) #3013

Job	Run time
get_path_matrix	6s
deb_validation (ubuntu-22.04, checkbox-ng)	2m 5s
deb_validation (self-hosted, focal, checkbox-ng)	1m 6s
deb_validation (ubuntu-24.04, checkbox-ng)	1m 37s
	4m 54s

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