Keep pdo mysql adapter fetch digit field type BC with php <= 8.0

[hungtrinh]

Close #323

Task done

• Specification PDO fetch mysql int type will return php 'int' string instead of php int type (test case)
  

  zf1-future/tests/Zend/Db/Adapter/Pdo/MysqlTest.php

  Lines 335 to 352 in 048b066

  	public function testGivenBeforePhp81WhenFetchDataOnDigitFieldThenPdoMysqlWillReturnStringDigit()
  	{
  	$params = $this->_util->getParams();
  	$db = Zend_Db::factory($this->getDriver(), $params);
  	$db->getConnection();
  	$select = $this->_db->select();
  	$select->from('zfproducts');
  	$stmt = $this->_db->query($select);
  	$products = $stmt->fetchAll();
  	$productId = $products[0]['product_id'] ?? '-1';
  	$this->assertSame(
  	'1',
  	$productId,
  	"BC with php < 8.1, fetch numeric field type will return 'digit' string instead of int or float type in php >= 8.1.\nSee: https://www.php.net/manual/en/migration81.incompatible.php#migration81.incompatible.pdo.mysql"
  	);
  	}

  
  Fail since php 8.1 https:/hungtrinh/zf1-future/actions/runs/4171264561/jobs/7221025095#step:7:436
• Specification PDO mysql adapter will init connection with driver_options PDO::ATTR_STRINGIFY_FETCHES is on (test case)
  

  zf1-future/tests/Zend/Db/Adapter/Pdo/MysqlTest.php

  Lines 354 to 374 in 7c3911c

  	/**
  	* https://www.php.net/manual/en/migration81.incompatible.php#migration81.incompatible.pdo.mysql
  	* @inheritDoc
  	*/
  	public function testAdapterZendConfigEmptyDriverOptions()
  	{
  	$params = $this->_util->getParams();
  	$params['driver_options'] = [];
  	$params = new Zend_Config($params);
  	$db = Zend_Db::factory($this->getDriver(), $params);
  	$db->getConnection();
  	$config = $db->getConfig();
  	if (PHP_VERSION_ID >= 80100) {
  	$this->assertEquals([PDO::ATTR_STRINGIFY_FETCHES => true], $config['driver_options']);
  	} else {
  	$this->assertSame([], $config['driver_options']);
  	}
  	}

  
  Fail since php 8.1 https:/hungtrinh/zf1-future/actions/runs/4171266288/jobs/7221028465#step:7:445
• Production code fulfil 2 specifications above
  

  zf1-future/library/Zend/Db/Adapter/Pdo/Mysql.php

  Lines 113 to 119 in 7c3911c

  	if (PHP_VERSION_ID >= 80100) {
  	// ensure $config['driver_options'] is an array
  	$this->_config['driver_options'] = $this->_config['driver_options'] ?? [];
  	if (!isset($this->_config['driver_options'][PDO::ATTR_STRINGIFY_FETCHES])) {
  	$this->_config['driver_options'][PDO::ATTR_STRINGIFY_FETCHES] = true;
  	}
  	}

  
  2 Spec done https:/hungtrinh/zf1-future/actions/runs/4171334806/jobs/7221167701#step:7:248

[hungtrinh]

Mr @glensc could you please review this PR, thanks

[glensc]

this looks similar to #320