Install setuptools before generate and check documentation

Closes #13628

.gitlab-ci.yml

@@ -60,6 +60,7 @@ documentation:
     paths:
       - .cache/pip/http-v2
   before_script:
+    - pip install setuptools
     - pip install -r "${PACKAGE}/${DOC_DIR}/requirements-doc.txt"
     - pip install sphinx-lint rstcheck[sphinx]
   script:

.gitlab-scripts/generate-doc.sh

@@ -9,6 +9,7 @@ export DOC_BASE_URL
 
 requirements=$(mktemp /tmp/requirements-doc-XXXXXXXXXX.txt)
 find . -name 'cookiecutter*' -prune -o -path '*/doc/requirements-doc.txt' -exec cat {} + | sort | uniq > "${requirements}"
+pip install setuptools
 pip install -r "${requirements}"
 
 (find . -name 'cookiecutter*' -prune -o -path '*/doc/conf.py' -print | while read path; do