client: add app testing feature #3605

Job	Run time
libs-build	2m 5s
client-build	3m 23s
apps-build	2m 48s
libs-vcpkg-build	2m 57s
client-vcpkg-build	3m 24s
apps-vcpkg-build	4m 14s
libs-cmake-build	3m 18s
libs-arm64-build	2m 20s
apps-arm64-build	8m 37s
manager-with-webview-vcpkg-build	23m 54s
server-build	5m 6s
manager-with-webview-build	9m 31s
manager-without-webview-build	10m 6s
unit-test-build	5m 1s
integration-test-build	8m 58s
	1h 35m 42s

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