PB-494: Update code to be compatible with PHP 7.4

- update deprecated expectException

Author: anthoula

dev/tests/integration/testsuite/Magento/PageBuilder/Model/Config/ContentType/ReaderTest.php

@@ -36,11 +36,9 @@ protected function setUp(): void
         );
     }
 
-    /**
-     * @expectedException \Magento\Framework\Exception\LocalizedException
-     */
     public function testPartial()
     {
+        $this->expectException(\Magento\Framework\Exception\LocalizedException::class);
         $file = file_get_contents(__DIR__ . '/../../../_files/content_type/type3_content_type2.xml');
         $this->fileResolverMock->expects($this->once())
             ->method('get')

dev/tests/integration/testsuite/Magento/PageBuilder/Model/Config/MenuSection/ReaderTest.php

@@ -36,11 +36,9 @@ protected function setUp(): void
         );
     }
 
-    /**
-     * @expectedException \Magento\Framework\Exception\LocalizedException
-     */
     public function testPartial()
     {
+        $this->expectException(\Magento\Framework\Exception\LocalizedException::class);
         $file = file_get_contents(__DIR__ . '/../../../_files/content_type/menu_section3.xml');
         $this->fileResolverMock->expects($this->once())
             ->method('get')