ci/gha: introduce step to check go.mod version

Introduce the step to validate if the go.mod is in conformance with
Kubernetes project standard by using the patch version from the build env
(ending with .0, x.y.0).

Author: mtulio

.github/workflows/deps.yml

@@ -47,3 +47,20 @@ jobs:
         uses: golang/govulncheck-action@v1
         with:
           go-version-file: tests/e2e/go.mod
+  gomod-dotzero-check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Checkout Repository"
+        uses: actions/checkout@v4
+        with:
+          show-progress: false
+      - name: "tests/e2e/go.mod must use Go version major.minor.0"
+        env:
+          GO_MOD_FILE: go.mod
+        run: |
+          test $(grep "^go " $GO_MOD_FILE | awk '{print $2}' | cut -d. -f3) != 0 && exit 1
+      - name: "tests/e2e/go.mod must use Go version major.minor.0"
+        env:
+          GO_MOD_FILE: tests/e2e/go.mod
+        run: |
+          test $(grep "^go " $GO_MOD_FILE | awk '{print $2}' | cut -d. -f3) != 0 && exit 1