delete buddy_allocator_test_data to make repo clean (#25046)

paddle/fluid/memory/detail/CMakeLists.txt

+include(ExternalProject)
+
 cc_library(memory_block SRCS memory_block.cc memory_block_desc.cc meta_cache.cc DEPS place)
 
 if(${WITH_GPU})
@@ -12,9 +14,27 @@ cc_library(buddy_allocator SRCS buddy_allocator.cc DEPS memory_block system_allo
 
 cc_test(buddy_allocator_test SRCS buddy_allocator_test.cc DEPS buddy_allocator)
 
+FUNCTION(file_download_and_uncompress URL NAME)
+  MESSAGE(STATUS "Download dependence[${NAME}] from ${URL}")
+  SET(${NAME}_INCLUDE_DIR ${THIRD_PARTY_PATH}/${NAME} PARENT_SCOPE)
+  ExternalProject_Add(
+      extern_download_${NAME}
+      ${EXTERNAL_PROJECT_LOG_ARGS}
+      PREFIX                ${THIRD_PARTY_PATH}/${NAME}
+      URL                   ${URL}
+      DOWNLOAD_DIR          ${THIRD_PARTY_PATH}/${NAME}
+      SOURCE_DIR            ${THIRD_PARTY_PATH}/${NAME}
+      DOWNLOAD_NO_PROGRESS  1
+      CONFIGURE_COMMAND     ""
+      BUILD_COMMAND         ""
+      UPDATE_COMMAND        ""
+      INSTALL_COMMAND       ""
+    )
+  set(third_party_deps ${third_party_deps} extern_download_${NAME} PARENT_SCOPE)
+ENDFUNCTION()
+
 if(WITH_TESTING)
   set_tests_properties(buddy_allocator_test PROPERTIES LABELS "RUN_TYPE=EXCLUSIVE")
-  add_custom_command(TARGET buddy_allocator_test POST_BUILD
-      COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/../../testdata/buddy_allocator_test_data ${CMAKE_CURRENT_BINARY_DIR}/buddy_allocator_test_data
-  )
+  set(URL "https://paddle-ci.cdn.bcebos.com/buddy_allocator_test_data.tar")
+  file_download_and_uncompress(URL "buddy_allocator")
 endif()