Add support for delve debugging in the shell #4971

Job	Run time
prepare	1s
test / prepare	2m 9s
test / run (containerd, ./frontend/dockerfile, integration)	4m 59s
test / run (containerd, ./frontend/dockerfile, dockerfile)	7m 16s
test / run (containerd-rootless, ./frontend/dockerfile, integration)	5m 19s
test / run (containerd-rootless, ./frontend/dockerfile, dockerfile)	7m 17s
test / run (containerd-1.6, ./frontend/dockerfile, integration)	4m 53s
test / run (containerd-1.6, ./frontend/dockerfile, dockerfile)	7m 28s
test / run (containerd-1.7, ./frontend/dockerfile, integration)	4m 57s
test / run (containerd-1.7, ./frontend/dockerfile, dockerfile)	6m 52s
test / run (containerd-snapshotter-stargz, ./frontend/dockerfile, integration)	6m 4s
test / run (containerd-snapshotter-stargz, ./frontend/dockerfile, dockerfile)	7m 18s
test / run (oci, ./frontend/dockerfile, integration)	4m 41s
test / run (oci, ./frontend/dockerfile, dockerfile)	6m 28s
test / run (oci-rootless, ./frontend/dockerfile, integration)	4m 32s
test / run (oci-rootless, ./frontend/dockerfile, dockerfile)	6m 0s
test / run (oci-rootless-slirp4netns-detachnetns, ./frontend/dockerfile, integration)	4m 38s
test / run (oci-rootless-slirp4netns-detachnetns, ./frontend/dockerfile, dockerfile)	5m 53s
test / run (oci-snapshotter-stargz, ./frontend/dockerfile, integration)	4m 47s
test / run (oci-snapshotter-stargz, ./frontend/dockerfile, dockerfile)	6m 4s
image (mainline)	5m 18s
image (labs)	5m 16s
scout	0s
release	0s
	1h 58m 10s

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