add arg for custom toolchain #862

Job	Run time
Run unit tests (setup)	30s
Run Integration Test (python, setup)	1m 41s
Run linters	15s
Run unit tests (grpc-interface-support)	34s
Run Integration Test (python, grpc-interface-support)	1m 28s
Run unit tests (vehicle-model-lifecycle)	40s
Run Integration Test (python, vehicle-model-lifecycle)	1m 15s
Run unit tests (sdk-installer)	35s
Run Integration Test (python, sdk-installer)	1m 21s
Run unit tests (build-system/cpp-cmake-conan)	30s
Run Integration Test (python, build-system/cpp-cmake-conan)	1m 3s
Run Integration Test (cpp, setup)	3m 17s
Run Integration Test (cpp, grpc-interface-support)	5m 5s
Run Integration Test (cpp, vehicle-model-lifecycle)	3m 35s
Run Integration Test (cpp, sdk-installer)	2m 59s
Run Integration Test (cpp, build-system/cpp-cmake-conan)	3m 21s
	28m 9s

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