modified timeout value on windows and mac (#26690)

cmake/generic.cmake

@@ -385,8 +385,12 @@ function(cc_test_run TARGET_NAME)
     set_property(TEST ${TARGET_NAME} PROPERTY ENVIRONMENT FLAGS_init_allocated_mem=true)
     set_property(TEST ${TARGET_NAME} PROPERTY ENVIRONMENT FLAGS_cudnn_deterministic=true)
     # No unit test should exceed 2 minutes.
+    if (APPLE OR WIN32)
+        set_tests_properties(${TARGET_NAME} PROPERTIES TIMEOUT 600)
+    else()
         set_tests_properties(${TARGET_NAME} PROPERTIES TIMEOUT 120)
     endif()
+  endif()
 endfunction()
 
 function(cc_test TARGET_NAME)
@@ -743,9 +747,14 @@ function(py_test TARGET_NAME)
                WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
     endif()
     
-    # No unit test should exceed 2 minutes.
+    if (APPLE OR WIN32)
+        set_tests_properties(${TARGET_NAME} PROPERTIES TIMEOUT 600)
+    else()
+        # No unit test should exceed 2 minutes in Linux.
         set_tests_properties(${TARGET_NAME} PROPERTIES TIMEOUT 120)
     endif()
+
+  endif()
 endfunction()
 
 # grpc_library generate grpc code using grpc_cpp_plugin and protoc