Convert OptionsDynamicValuesApiTest into a Kernel test

Closes #3414501

core/modules/options/tests/src/Functional/OptionsDynamicValuesApiTest.php

-<?php
-
-namespace Drupal\Tests\options\Functional;
-
-/**
- * Tests the options allowed values api.
- *
- * @group options
- */
-class OptionsDynamicValuesApiTest extends OptionsDynamicValuesTestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  protected $defaultTheme = 'stark';
-
-  /**
-   * Tests options_allowed_values().
-   *
-   * @see options_test_dynamic_values_callback()
-   */
-  public function testOptionsAllowedValues() {
-    // Test allowed values without passed $items.
-    $values = options_allowed_values($this->fieldStorage);
-    $this->assertEquals([], $values);
-
-    $values = options_allowed_values($this->fieldStorage, $this->entity);
-
-    $expected_values = [
-      $this->entity->label(),
-      $this->entity->toUrl()->toString(),
-      $this->entity->uuid(),
-      $this->entity->bundle(),
-    ];
-    $expected_values = array_combine($expected_values, $expected_values);
-    $this->assertEquals($expected_values, $values);
-  }
-
-}