title: Custom Attribute for quote table is not saving value
body: <p>i am trying to add custom_attribute to <code>quote</code> table name as <code>is_requested</code>. this work fine, column is created. here is Upgrade schem</p>
  <pre><code>use Magento\Framework\Setup\UpgradeSchemaInterface;
  use Magento\Framework\Setup\SchemaSetupInterface;
  use Magento\Framework\Setup\ModuleContextInterface;
  
  class UpgradeSchema implements UpgradeSchemaInterface
  {
  
      public function upgrade(SchemaSetupInterface $setup, ModuleContextInterface $context)
      {
          $setup-&gt;startSetup();
  
          $setup-&gt;getConnection()
              -&gt;addColumn(
                  $setup-&gt;getTable('quote'),
                  'is_requested',
                  [
                      'type' =&gt; \Magento\Framework\DB\Ddl\Table::TYPE_INTEGER,
                      'length' =&gt; 255,
                      'nullable' =&gt; true,
                      'default' =&gt; 0,
                      'comment' =&gt; 'Requested Quote'
                  ]
              );
          $setup-&gt;endSetup();
      }
  }
  </code></pre>
  <p>now the problem is when i try to add value by this code</p>
  <pre><code>Magento\Quote\Model\QuoteFactory $quote;
  
  $quote = $this-&gt;quote-&gt;create();
  $quote-&gt;setCustomAttribute('is_requested', '1')-&gt;save();
  </code></pre>
  <p>value is not save in <code>quote</code> table.</p>