fix: disable CRoaring tests and microbenchmarks (#241)

Previously, we mistakenly used the outdated option BUILD_TESTING for
CRoaring, change it to ENABLE_ROARING_TESTS, and also disable
ENABLE_ROARING_MICROBENCHMARKS.

Author: zhjwpku

cmake_modules/IcebergThirdpartyToolchain.cmake

@@ -267,9 +267,8 @@ endfunction()
 function(resolve_croaring_dependency)
   prepare_fetchcontent()
 
-  set(BUILD_TESTING
-      OFF
-      CACHE BOOL "Disable CRoaring tests" FORCE)
+  set(ENABLE_ROARING_TESTS OFF)
+  set(ENABLE_ROARING_MICROBENCHMARKS OFF)
 
   fetchcontent_declare(croaring
                        ${FC_DECLARE_COMMON_OPTIONS}