Add the SPA form and REST API to review the OpenStack launch template in the Cloud module

@ryo-yamashita

Thank you for adding the form. Can you please refactor the following coding standard suggestions? Thanks!

FILE: ...e_providers/openstack/src/Service/OpenStackOperationsService.php
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FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
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 3257 | WARNING | \Drupal calls should be avoided in classes, use
      |         | dependency injection instead
 3270 | WARNING | \Drupal calls should be avoided in classes, use
      |         | dependency injection instead
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@ryo-yamashita

Thank you for the update. It looks good to me now. I'll merge the patch to 4.x and 5.x, and close this issue as Fixed.