force checkout to the client repo in the workflow (DataDog#3359)

Author: MintsInc

.github/workflows/reusable-go-test.yml

@@ -38,6 +38,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
         with:
+          repository: DataDog/datadog-api-client-go
           ref: ${{ inputs.target-branch || github.ref }}
       - name: Install Go
         uses: actions/setup-go@v4