message: [cmake] make WASM_TOOLCHAIN mandatory (for a while)
diff: -find_package(Wasm REQUIRED)
  +find_package(Wasm)
  include(FindPackageHandleStandardArgs)
  find_package_handle_standard_args(WASM_TOOLCHAIN DEFAULT_MSG WASM_FOUND)
  +if (NOT WASM_TOOLCHAIN_FOUND)
  + return()
  +endif()
  +
  macro(compile_wast)
  #read arguments include ones that we don't since arguments get forwared "as is" and we don't want to threat unknown argument names as values
  cmake_parse_arguments(ARG "NOWARNINGS" "TARGET;DESTINATION_FOLDER" "SOURCE_FILES;INCLUDE_FOLDERS;SYSTEM_INCLUDE_FOLDERS;LIBRARIES" ${ARGN})
  