Add byContains and byJsonPath throughout

- Change to JSON Path function to work around PDO syntax quirk

tests/unit/Query/RemoveFieldsTest.php

@@ -112,7 +112,8 @@ class RemoveFieldsTest extends TestCase
     public function testByJsonPathSucceedsForPostgreSQL(): void
     {
         Configuration::$mode = Mode::PgSQL;
-        $this->assertEquals('UPDATE dessert SET data = data - :cake::text[] WHERE data @? :path::jsonpath',
+        $this->assertEquals(
+            'UPDATE dessert SET data = data - :cake::text[] WHERE jsonb_path_exists(data, :path::jsonpath)',
             RemoveFields::byJsonPath('dessert', Parameters::fieldNames(':cake', ['b', 'c'])),
             'UPDATE statement not correct');
     }