Add PostgreSQL version of SQLite integ tests

- Add PostgreSQL throwaway database
- Add optional length parameter for random string
- Fix syntax for PostgreSQL in several areas
- Add optional ID for whereById type determination

tests/integration/sqlite/PatchTest.php

@@ -44,7 +44,6 @@ class PatchTest extends TestCase
         $this->assertTrue(true, 'The above not throwing an exception is the test');
     }
 
-
     public function testByFieldsSucceedsWhenADocumentIsUpdated(): void
     {
         Patch::byFields(ThrowawayDb::TABLE, [Field::EQ('value', 'purple')], ['num_value' => 77]);