refactor(typing): Explict cast for mypy.

Author: walanguzzi

sqlmesh/core/config/connection.py

@@ -1726,7 +1726,7 @@ def handle_datetimeoffset_mssql_python(dto_value: t.Any) -> t.Any:
 
                 conn.add_output_converter(-155, handle_datetimeoffset_mssql_python)
 
-                return conn
+                return t.cast(t.Any, conn)
 
             return connect_mssql_python
 
@@ -1818,7 +1818,7 @@ def handle_datetimeoffset_pyodbc(dto_value: t.Any) -> t.Any:
 
                 conn.add_output_converter(-155, handle_datetimeoffset_pyodbc)
 
-                return conn
+                return t.cast(t.Any, conn)
 
             return connect_pyodbc