Improve debugging with `dlv dap` (in VSCode, for example) #5667

Job	Run time
Integration tests	10m 21s
Colima (v0.6.5)	7m 0s
Integration tests (on Linux) (alpine.yaml)	6m 1s
Lints	1m 49s
Integration tests (on Linux) (debian.yaml)	6m 19s
Unit tests (1.22.x)	57s
Upgrade test (v0.15.1)	3m 38s
Integration tests (on Linux) (fedora.yaml)	6m 27s
Unit tests (1.23.x)	3m 55s
VMNet test	23m 17s
Integration tests (on Linux) (archlinux.yaml)	8m 11s
vz (default.yaml)	14m 14s
Integration tests (on Linux) (opensuse.yaml)	9m 12s
Windows tests	5m 27s
vz (fedora.yaml)	26m 58s
Integration tests (on Linux) (experimental/net-user-v2.yaml)	7m 15s
Integration tests (on Linux) (experimental/9p.yaml)	6m 31s
Integration tests (on Linux) (docker.yaml)	7m 33s
Integration tests (on Linux) (../hack/test-templates/alpine-9p-writable.yaml)	5m 27s
Integration tests (on Linux) (../hack/test-templates/test-misc.yaml)	19m 4s
	2h 59m 36s

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