Add better diagnostics on auto dependencies upgrade (#27215)

Whenever upgrade-to-newer-dependencies is set, our CI will attempt
to upgrade all dependencies to latest versions released. However so
far it was not clear which dependencies were upgraded so if CI
failed because of some dependency release, you had to guess and
manually check which dependencies got upgraded.

This PR adds a step that will show the diff between the constraints
in the target branch (`constraints-main` or `constraints-X-Y` in
case upgrade-to-newer-dependencies is enabled.

.github/workflows/build-images.yml

@@ -237,6 +237,11 @@ ${{ hashFiles('.pre-commit-config.yaml') }}"
           DOCKER_CACHE: ${{ needs.build-info.outputs.cache-directive }}
           IMAGE_TAG: ${{ env.IMAGE_TAG_FOR_THE_BUILD }}
           PYTHON_VERSIONS: ${{ needs.build-info.outputs.all-python-versions-list-as-string }}
+      - name: "Show dependencies to be upgraded"
+        run: >
+          breeze release-management generate-constraints
+          --airflow-constraints-mode constraints-source-providers
+        if: needs.build-info.outputs.upgrade-to-newer-dependencies != 'false'
       - name: Push empty CI image ${{ env.PYTHON_MAJOR_MINOR_VERSION }}:${{ env.IMAGE_TAG_FOR_THE_BUILD }}
         if: failure() || cancelled()
         run: breeze ci-image build --push --empty-image --run-in-parallel

.github/workflows/ci.yml

@@ -409,6 +409,11 @@ ${{ hashFiles('.pre-commit-config.yaml') }}"
           PYTHON_VERSIONS: ${{ needs.build-info.outputs.all-python-versions-list-as-string }}
           DEBUG_RESOURCES: ${{ needs.build-info.outputs.debug-resources }}
         if: needs.build-info.outputs.in-workflow-build == 'true'
+      - name: "Show dependencies to be upgraded"
+        run: >
+          breeze release-management generate-constraints
+          --airflow-constraints-mode constraints-source-providers
+        if: needs.build-info.outputs.upgrade-to-newer-dependencies != 'false'
       - name: "Candidates for pip resolver backtrack triggers"
         if: failure() || cancelled()
         run: >