Add support for mistral-large (#11398)

Author: ravi03071991

llama-index-integrations/llms/llama-index-llms-mistralai/llama_index/llms/mistralai/utils.py

@@ -4,6 +4,7 @@
     "mistral-tiny": 32000,
     "mistral-small": 32000,
     "mistral-medium": 32000,
+    "mistral-large": 32000,
 }