Make various scripts use the same version of Node

templates/tools/dockerfile/node_deps.include

tools/dockerfile/interoptest/grpc_interop_node/Dockerfile

tools/dockerfile/test/multilang_jessie_x64/Dockerfile

tools/dockerfile/test/node_jessie_x64/Dockerfile

tools/run_tests/artifacts/build_artifact_node.sh

tools/run_tests/artifacts/build_package_node.sh

tools/run_tests/helper_scripts/build_node_electron.sh

tools/run_tests/helper_scripts/pre_build_node_electron.sh

tools/run_tests/helper_scripts/run_node_electron.sh

tools/run_tests/performance/run_worker_node.sh