koordlet: collect metric for host application memory usage with page cache #8551

Job	Run time
golangci-lint	4m 40s
golangci-lint	4m 40s
unit-tests(Check Go modules)	34s
unit-tests(Check Go modules)	34s
unit-tests(Check manifests)	1m 16s
unit-tests(Check manifests)	1m 16s
unit-tests(Check auto-generated codes)	2m 54s
unit-tests(Check auto-generated codes)	2m 54s
unit-tests(Verify gofmt)	45s
unit-tests(Verify gofmt)	45s
unit-tests(Verify govet)	1m 41s
unit-tests(Verify govet)	1m 41s
unit-tests(Run Go build)	2m 20s
unit-tests(Run Go build)	2m 20s
unit-tests(Run Go test)	6m 10s
unit-tests(Run Go test)	8m 37s
build-and-push	0s
build-and-push (koordlet)	3m 48s
build-and-push (koord-manager)	2m 27s
build-and-push (koord-scheduler)	3m 5s
build-and-push (koord-descheduler)	3m 0s
	55m 27s

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