vlab and hlab stability troubleshooting and improvements #2130

Job	Run time
build-multi	2m 3s
test	2m 39s
build (ubuntu-latest-x86-4-cores, --mode=manual)	1m 45s
build (ubuntu-latest-x86-4-cores, --mode=usb)	2m 22s
build (ubuntu-latest-x86-4-cores, --mode=iso)	2m 5s
build (ubuntu-24.04-arm64-4-core, --mode=manual)	1m 58s
build (ubuntu-24.04-arm64-4-core, --mode=usb)	2m 21s
build (ubuntu-24.04-arm64-4-core, --mode=iso)	2m 38s
build (macos-latest, --mode=manual)	2m 45s
build (macos-latest, --mode=usb)	3m 42s
build (macos-latest, --mode=iso)	3m 46s
builds	1s
vlab-upgrade (spine-leaf, beta-1, --usb)	39m 41s
vlab (spine-leaf, false, usb)	29m 29s
hlab (spine-leaf, true, iso)	43m 36s
vlab-upgrade (spine-leaf, 24.09, -m=iso)	38m 39s
vlab (spine-leaf, false, iso)	26m 10s
vlab (spine-leaf, false, manual)	26m 4s
vlab (collapsed-core, false, iso)	26m 7s
vlab (spine-leaf, true, usb)	29m 48s
vlab (spine-leaf, true, iso)	29m 58s
vlabs	1s
hlabs	1s
publish-master	0s
publish-release	0s
	5h 17m 39s

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