Issue #3216934 by paulocs: Move the Tests folder in ./src/Tests to the right place

src/Tests/LibrariesWebTest.php → tests/src/Functional/LibrariesWebTest.php

 <?php
 
-namespace Drupal\libraries\Tests;
+namespace Drupal\Tests\libraries\Functional;
 
 use Drupal\Component\Utility\Html;
 use Drupal\Tests\BrowserTestBase;

src/Tests/LibrariesUnitTest.php → tests/src/Kernel/LibrariesApi/LibrariesUnitTest.php

 <?php
 
-namespace Drupal\libraries\Tests;
+namespace Drupal\Tests\libraries\Kernel\LibrariesApi;
 
 use Drupal\KernelTests\KernelTestBase;