Add test cases for cloud service provider menu in AWS

1. +++ b/modules/cloud_service_providers/aws_cloud/tests/src/Functional/cloud/config/AwsCloudConfigTest.php
   @@ -324,4 +337,128 @@ class AwsCloudConfigTest extends CloudConfigTestBase {
   +    $target_region_index = random_int(0, count($regions) - 1);
   +    $target_region_display_name = $regions[array_keys($regions)[$target_region_index]];
   

   Can we use an array_rand function here? (Please search array_rand($regions) in the enter source code as a reference.)

2. +++ b/modules/cloud_service_providers/aws_cloud/tests/src/Functional/cloud/config/AwsCloudConfigTest.php
   @@ -324,4 +337,128 @@ class AwsCloudConfigTest extends CloudConfigTestBase {
   +          $add[$i]["regions[]"][] = $region_name;
   

   Change to $add[$i]['regions[]'][]

3. +++ b/modules/cloud_service_providers/aws_cloud/tests/src/Functional/cloud/config/AwsCloudConfigTest.php
   @@ -324,4 +337,128 @@ class AwsCloudConfigTest extends CloudConfigTestBase {
   +      $this->assertSession()->statusCodeEquals(200);
   

   Change to $this->assertNoErrorMessage();

@jigishaddweb

Thank you for the update.

1. +++ b/modules/cloud_service_providers/aws_cloud/tests/src/Functional/cloud/config/AwsCloudConfigTest.php
   @@ -324,4 +337,129 @@ class AwsCloudConfigTest extends CloudConfigTestBase {
   +      // @FIXME: Not refactored due to the error message,
   +      // The module Google Applications is invalid. Please enable the module.
   +      $this->assertSession()->statusCodeEquals(200);
   

   The comment is good. So can we use $this->assertWarningMessage() here? We can change the comment as follows:

         // @FIXME: We don't use assertNoErrorMessage(), since it displays
         // "The module Google Applications is invalid. Please enable the module."

2. Also, please fix the coding standard violation at https://www.drupal.org/pift-ci-job/1795460

@jigishaddweb

Thank you for adding the test case. It looks good to me. I'll merge the patch to 8.x-1.x, 8.x-2.x and 3.x and close this issue as Fixed.