community[patch]: Fix validation error in SettingsConfigDict across multiple Langchain modules (#26852)

- **Description:** This pull request addresses the validation error in
`SettingsConfigDict` due to extra fields in the `.env` file. The issue
is prevalent across multiple Langchain modules. This fix ensures that
extra fields in the `.env` file are ignored, preventing validation
errors.
  **Changes include:**
    - Applied fixes to modules using `SettingsConfigDict`.

- **Issue:** NA, similar
https://github.com/langchain-ai/langchain/issues/26850
- **Dependencies:** NA

libs/community/langchain_community/vectorstores/clickhouse.py

@@ -96,7 +96,10 @@ class ClickhouseSettings(BaseSettings):
         return getattr(self, item)
 
     model_config = SettingsConfigDict(
-        env_file=".env", env_file_encoding="utf-8", env_prefix="clickhouse_"
+        env_file=".env",
+        env_file_encoding="utf-8",
+        env_prefix="clickhouse_",
+        extra="ignore",
     )