Script to check if entries in go.mod files are in sync

- ensure that the root go.mod and the module specific go.mod have the
  same `require` and `replace` directives for different dependencies.

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

.github/workflows/ci.yml

@@ -71,6 +71,7 @@ jobs:
 
       - name: verify go modules and vendor directory
         run: |
+          sudo apt-get install -y jq
           make verify-vendor
         working-directory: src/github.com/containerd/containerd