Clean up scripts and re-use common functionality #743

Job	Run time
Run unit tests (setup)	29s
Run Integration Test (python, setup)	1m 13s
Run linters	12s
Run unit tests (grpc-interface-support)	33s
Run Integration Test (python, grpc-interface-support)	1m 2s
Run unit tests (vehicle-model-lifecycle)	34s
Run Integration Test (python, vehicle-model-lifecycle)	52s
Run unit tests (sdk-installer)	35s
Run Integration Test (python, sdk-installer)	1m 9s
Run unit tests (build-system/cpp-cmake-conan)	35s
Run Integration Test (python, build-system/cpp-cmake-conan)	52s
Run Integration Test (cpp, setup)	3m 22s
Run Integration Test (cpp, grpc-interface-support)	3m 0s
Run Integration Test (cpp, vehicle-model-lifecycle)	3m 17s
Run Integration Test (cpp, sdk-installer)	2m 55s
Run Integration Test (cpp, build-system/cpp-cmake-conan)	2m 49s
	23m 29s

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