ci: Workaround bug preventing Django test runs

Workaround pypa/setuptools#4519 by constraining `setuptools<72.0.0` when installing dependencies for Django tests.

Author: szokeasaurusrex

.github/workflows/test-integrations-web-frameworks-1.yml

@@ -64,7 +64,6 @@ jobs:
       - name: Test django latest
         run: |
           set -x # print commands that are executed
-          export PIP_CONSTRAINT=constraints.txt
           ./scripts/runtox.sh "py${{ matrix.python-version }}-django-latest"
       - name: Test flask latest
         run: |
@@ -141,7 +140,6 @@ jobs:
       - name: Test django pinned
         run: |
           set -x # print commands that are executed
-          export PIP_CONSTRAINT=constraints.txt
           ./scripts/runtox.sh --exclude-latest "py${{ matrix.python-version }}-django"
       - name: Test flask pinned
         run: |

scripts/split-tox-gh-actions/templates/test_group.jinja

@@ -95,4 +95,4 @@
         uses: codecov/test-results-action@v1
         with:
           token: {% raw %}${{ secrets.CODECOV_TOKEN }}{% endraw %}
-          files: .junitxml
+          files: .junitxml

tox.ini

@@ -647,6 +647,7 @@ setenv =
     PYTHONDONTWRITEBYTECODE=1
     OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
     COVERAGE_FILE=.coverage-{envname}
+    PIP_CONSTRAINTS=constraints.txt
     django: DJANGO_SETTINGS_MODULE=tests.integrations.django.myapp.settings
 
     common: TESTPATH=tests