ci: reduce CircleCI Windows resource class to medium

The large resource class consumes significantly more credits than the medium resource class.

(cherry picked from commit 095bb7f)

Author: clydin

.circleci/dynamic_config.yml

@@ -328,7 +328,6 @@ jobs:
   # Windows jobs
   e2e-cli-win:
     executor: windows-executor
-    resource_class: windows.large
     parallelism: 16
     steps:
       - checkout