Increase rate limit on LLM requests to 1000/hr (via env var) (#12396)

Release Notes:

- N/A

Co-authored-by: Marshall <marshall@zed.dev>

crates/collab/k8s/collab.template.yml

@@ -172,6 +172,8 @@ spec:
                 secretKeyRef:
                   name: slack
                   key: panics_webhook
+            - name: COMPLETE_WITH_LANGUAGE_MODEL_RATE_LIMIT_PER_HOUR
+              value: "1000"
             - name: SUPERMAVEN_ADMIN_API_KEY
               valueFrom:
                 secretKeyRef: