🚚(collaboration) change the websocket url name

We will have 2 urls targeting the server, better
to improve the naming to avoid confusion.

src/backend/core/api/viewsets.py

@@ -1002,7 +1002,7 @@ class ConfigView(views.APIView):
             Return a dictionary of public settings.
         """
         array_settings = [
-            "COLLABORATION_SERVER_URL",
+            "COLLABORATION_WS_URL",
             "CRISP_WEBSITE_ID",
             "ENVIRONMENT",
             "FRONTEND_THEME",

src/backend/core/tests/test_api_config.py

@@ -16,7 +16,7 @@ pytestmark = pytest.mark.django_db
 
 
 @override_settings(
-    COLLABORATION_SERVER_URL="http://testcollab/",
+    COLLABORATION_WS_URL="http://testcollab/",
     CRISP_WEBSITE_ID="123",
     FRONTEND_THEME="test-theme",
     MEDIA_BASE_URL="http://testserver/",
@@ -34,7 +34,7 @@ def test_api_config(is_authenticated):
     response = client.get("/api/v1.0/config/")
     assert response.status_code == HTTP_200_OK
     assert response.json() == {
-        "COLLABORATION_SERVER_URL": "http://testcollab/",
+        "COLLABORATION_WS_URL": "http://testcollab/",
         "CRISP_WEBSITE_ID": "123",
         "ENVIRONMENT": "test",
         "FRONTEND_THEME": "test-theme",

src/backend/impress/settings.py

@@ -372,8 +372,8 @@ class Base(Configuration):
     SENTRY_DSN = values.Value(None, environ_name="SENTRY_DSN", environ_prefix=None)
 
     # Collaboration
-    COLLABORATION_SERVER_URL = values.Value(
-        None, environ_name="COLLABORATION_SERVER_URL", environ_prefix=None
+    COLLABORATION_WS_URL = values.Value(
+        None, environ_name="COLLABORATION_WS_URL", environ_prefix=None
     )
 
     # Frontend