Project object c14n in separte file

Create separate file for canonicalization of project factory objects and
introduce duplicate-diff lint checker.

.github/workflows/linting.yml

@@ -120,3 +120,8 @@ jobs:
           diff -rub /tmp/versions.tf /tmp/versions.tofu
           DIFF_EC=$?
           [[ "${DIFF_EC}" -eq "0" ||  -z "${OUTPUT_TF}" || -z "${OUTPUT_TOFU}" ]]
+
+      - name: Check for diverging files
+        id: duplicates
+        run: |
+          python3 tools/duplicate-diff.py