Make internal query() retryable for postgresql

In a [previous commit][1], the abstract adapter's `query` method was
changed to automatically retry (since the method is used for SCHEMA type
queries, which are idempotent SELECTs). However, the postgresql adapter
has its own `query` method and it was not changed.

This commit makes the same change to the postgresql adapter's `query` so
that it can also benefit from automatically retryable SCHEMA queries.

[1]: b4c19d0

Author: skipkayhil

activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb

@@ -11,8 +11,8 @@ def explain(arel, binds = [], options = [])
         end
 
         # Queries the database and returns the results in an Array-like object
-        def query(sql, name = nil) # :nodoc:
-          result = internal_execute(sql, name)
+        def query(sql, name = nil, allow_retry: true, materialize_transactions: true) # :nodoc:
+          result = internal_execute(sql, name, allow_retry:, materialize_transactions:)
           result.map_types!(@type_map_for_results).values
         end