Issue #3262574 by TamakiFujino, yas: Add a BDD test suite for deleting K8s Cloud service provider

modules/cloud_service_providers/k8s/tests/src/Behat/features/templates/K8s-ATDD-00-92-AdminDeleteResources.feature

+Feature: Delete the created resources as "Administrator"
+  In order to change to clean state
+  As an admin
+  I need to delete some resource
+
+  @api
+  Scenario: Delete a created role
+    Given I am logged in as a user with the "Administrator" role
+    And I visit "/admin/people/roles"
+    And I should see "{{ role_name }}"
+    When I visit "/admin/people/roles/manage/{{ role_name_machine }}/delete?destination=/admin/people/roles"
+    And I press "Delete"
+    Then I should be on "/admin/people/roles"
+    And I should see "has been deleted."
+    And I should not see the link "{{ role_name }}"
+
+  @api
+  Scenario: Delete created Cloud service providers
+    Given I am logged in as a user with the "Administrator" role
+    When I visit "/admin/structure/cloud_config"
+    And I check the box "edit-cloud-config-bulk-form-0"
+    And I press "Apply to selected items"
+    And I press "Delete"
+    Then I should be on "/admin/structure/cloud_config"
+    And I should see "Deleted 1 item."
+    And I should not see the link "{{ k8s_cloud_service_provider_name }}"