update logging for slack interactive_api_endpoint (#2022)

# What this PR does

In trying to solve
https://github.com/grafana/oncall-private/issues/1836, it is very
difficult to understand the root cause without seeing the event payload.
This PR will log this out.

## Checklist

- [ ] Unit, integration, and e2e (if applicable) tests updated (N/A)
- [ ] Documentation added (or `pr:no public docs` PR label added if not
required) (N/A)
- [ ] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required) (N/A)

engine/apps/slack/views.py

@@ -152,14 +152,7 @@ class SlackEventApiEndpointView(APIView):
         if isinstance(payload, str):
             payload = json.JSONDecoder().decode(payload)
 
-        logger.info(
-            "team_id: %s channel_id: %s user_id: %s command: %s event: %s",
-            payload.get("team_id"),
-            payload.get("channel_id"),
-            payload.get("user_id"),
-            payload.get("command"),
-            payload.get("event", {}).get("type"),
-        )
+        logger.debug(f"Slack payload is {payload}")
 
         # Checking if it's repeated Slack request
         if "HTTP_X_SLACK_RETRY_NUM" in request.META and int(request.META["HTTP_X_SLACK_RETRY_NUM"]) > 1: