feat(memcache): add resize command

- Add `resize` command to the memcache product
- Bump `github.com/ucloud/ucloud-sdk-go` to `v0.22.90` (required for
  `NewResizeUMemcacheGroupRequest` / `ResizeUMemcacheGroup`)
- Update `cmdtree` / `completion` golden testdata for memcache

Co-Authored-By: Claude <noreply@anthropic.com>