add support for gpt-4o-mini (#1827)

### What problem does this PR solve?

add support for gpt-4o-mini

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: Kevin Hu <[email protected]>

conf/llm_factories.json

@@ -6,6 +6,12 @@
             "tags": "LLM,TEXT EMBEDDING,SPEECH2TEXT,MODERATION",
             "status": "1",
             "llm": [
+                {
+                    "llm_name": "gpt-4o-mini",
+                    "tags": "LLM,CHAT,128K",
+                    "max_tokens": 128000,
+                    "model_type": "image2text"
+                },
                 {
                     "llm_name": "gpt-4o",
                     "tags": "LLM,CHAT,128K",
@@ -540,6 +546,12 @@
             "tags": "LLM,TEXT EMBEDDING,SPEECH2TEXT,MODERATION",
             "status": "1",
             "llm": [
+                {
+                    "llm_name": "azure-gpt-4o-mini",
+                    "tags": "LLM,CHAT,128K",
+                    "max_tokens": 128000,
+                    "model_type": "image2text"
+                },
                 {
                     "llm_name": "azure-gpt-4o",
                     "tags": "LLM,CHAT,128K",
@@ -2426,4 +2438,4 @@
             ]
         }
     ]
-}
+}