Disable supports_statement_cache in sqlalchemy dialect

on sqlalchemy>=1.4 a warning is raised if supports_statement_cache is not set.
To avoid the warning, supports_statement_cache is set to False.
more testing is required to set this to True.

Author: DeanLa

trino/sqlalchemy/dialect.py

@@ -55,6 +55,11 @@ class TrinoDialect(DefaultDialect):
     supports_multivalues_insert = True
     postfetch_lastrowid = False
 
+    # Caching
+    # Warnings are generated by SQLAlchmey if this flag is not explicitly set
+    # and tests are needed before being enabled
+    supports_statement_cache = False
+
     @classmethod
     def dbapi(cls):
         """