vm-monitor: Switch from memory.high to polling memory.stat #13406

Job	Run time
check-permissions	1s
tag	12s
check-codestyle-rust	8m 27s
check-codestyle-python	38s
build-neon (debug)	7m 43s
build-neon (release)	7m 0s
neon-image	10m 32s
compute-tools-image	3m 53s
compute-node-image (v14)	16m 13s
trigger-custom-extensions-build-and-wait	1m 4s
compute-node-image (v15)	16m 14s
compute-node-image (v16)	16m 21s
regress-tests (debug, v14)	14m 0s
regress-tests (debug, v15)	10m 58s
regress-tests (debug, v16)	11m 31s
benchmarks	0s
regress-tests (release, v14)	8m 46s
regress-tests (release, v15)	9m 9s
regress-tests (release, v16)	8m 56s
test-images	3m 1s
vm-compute-node-image (v14)	1m 31s
vm-compute-node-image (v15)	1m 37s
vm-compute-node-image (v16)	1m 36s
promote-images	1m 32s
trigger-e2e-tests	8s
coverage-report (debug)	9m 53s
promote-compatibility-data	0s
deploy	0s
create-test-report	3m 50s
	2h 54m 46s

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