tox: move pylint to separate environment (#63008)

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py3-django22-codestyle-coverage-pylint
+envlist = py3-django22-codestyle-coverage, pylint
 toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/chrono/{env:BRANCH_NAME:}
 
 [testenv]
@@ -33,5 +33,23 @@ commands =
   ./getlasso3.sh
   python3 setup.py compile_translations
   py.test {env:COVERAGE:} {posargs:tests/}
-  pylint: ./pylint.sh chrono/ tests/
   codestyle: pre-commit run --all-files --show-diff-on-failure
+
+[testenv:pylint]
+deps =
+  pytest-django
+  pytest!=5.3.3
+  WebTest
+  mock<4
+  httmock
+  pylint
+  pylint-django
+  django-webtest
+  pytz
+  pyquery
+  django-mellon>=1.6.1
+  pytest-freezegun
+  psycopg2-binary<2.9
+commands =
+  ./getlasso3.sh
+  pylint: ./pylint.sh chrono/ tests/