chore: remove explicit install of ginkgo in CI

Remove the explicit install of the `ginkgo` binary in the CI
workflow as it is now automatically installed when running the tests
through the Makefile

.github/workflows/check-pull-request.yaml

@@ -39,10 +39,6 @@ jobs:
       with:
         go-version: ${{ matrix.go }}
 
-    - name: Setup Go tools
-      run: |
-        go install github.com/onsi/ginkgo/v2/[email protected]
-
     - name: Run the tests
       run: make tests ginkgo_flags="--skip-package leadership,retry"