Add cmake rule iree_fetch_artifact (#10516)

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5df8be9..416578f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -369,6 +369,7 @@
 include(iree_microbenchmark_suite)
 include(iree_hal_cts_test_suite)
 include(iree_static_linker_test)
+include(iree_fetch_artifact)
 
 set(CMAKE_POSITION_INDEPENDENT_CODE TRUE)