Re add posibilitty to pass an alternative github token to the workflow

Author: Nicoretti

.github/workflows/checks.yml

@@ -1,6 +1,10 @@
 name: Checks
 
-on: workflow_call
+on:
+  workflow_call:
+    secrets:
+      ALTERNATIVE_GITHUB_TOKEN:
+        required: false
 
 jobs:
 
@@ -82,6 +86,8 @@ jobs:
     name: Tests (Python-${{ matrix.python-version }}, Exasol-${{ matrix.exasol-version}})
     needs: [build-documentation-job, lint-job, type-check-job]
     runs-on: ubuntu-latest
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN || secrets.ALTERNATIVE_GITHUB_TOKEN }}
     strategy:
       fail-fast: false
       matrix: