message: [test] use cmake to build ot-rcp
  This commit switch to cmake when building ot-rcp during tests.
diff: @@ -74,8 +74,8 @@ main()
  SOCAT_OUTPUT=/tmp/ot-socat
  if ! command -v ot-rcp; then
  - make -f third_party/openthread/repo/examples/Makefile-simulation DISABLE_DOC=1 TargetTuple=otbr
  - export PATH=$PATH:output/otbr/bin
  + third_party/openthread/repo/script/cmake-build simulation -DOT_COVERAGE=OFF
  + PATH=$PATH:build/simulation/examples/apps/ncp
  fi
  check_upstart
  