Add sysprep support for ovirt

Add sysprep specification support for vm provisioning from template
for the oVirt provider.

Depends on: ManageIQ/manageiq#17636
Required for: ManageIQ/manageiq-ui-classic#4211
Implements: https://bugzilla.redhat.com/show_bug.cgi?id=1553833

app/models/manageiq/providers/redhat/infra_manager/provision/configuration.rb

@@ -21,8 +21,11 @@ def configure_cloud_init
   end
 
   def configure_sysprep
-    content = get_option(:sysprep_upload_text)
-
+    if options[:sysprep_enabled][1] == "Sysprep Specification"
+      content = customization_template_content
+    else
+      content = get_option(:sysprep_upload_text)
+    end
     return unless content
     with_provider_destination { |d| d.update_sysprep!(content) }
 
@@ -37,9 +40,8 @@ def configure_container
       configure_cpu(rhevm_vm)
       configure_host_affinity(rhevm_vm)
       configure_network_adapters
-
       sysprep_option = get_option(:sysprep_enabled)
-      if sysprep_option == 'file'
+      if sysprep_option == 'file' || sysprep_specification_selected?
         configure_sysprep
       elsif sysprep_option == 'fields'
         configure_cloud_init
@@ -49,6 +51,10 @@ def configure_container
 
   private
 
+  def sysprep_specification_selected?
+    options.dig(:sysprep_enabled,1) == "Sysprep Specification"
+  end
+
   def customization_template_content
     return unless customization_template
     options = prepare_customization_template_substitution_options

app/models/manageiq/providers/redhat/infra_manager/provision_workflow.rb

@@ -1,5 +1,6 @@
 class ManageIQ::Providers::Redhat::InfraManager::ProvisionWorkflow < MiqProvisionInfraWorkflow
   include CloudInitTemplateMixin
+  include SysprepTemplateMixin
 
   def self.default_dialog_file
     'miq_provision_dialogs'
@@ -55,7 +56,11 @@ def update_field_visibility_linked_clone(_options = {}, f)
 
   def allowed_customization_templates(options = {})
     if supports_native_clone?
-      allowed_cloud_init_customization_templates(options)
+      if get_source_vm.platform == 'windows'
+        allowed_sysprep_customization_templates(options)
+      else
+        allowed_cloud_init_customization_templates(options)
+      end
     else
       super(options)
     end
@@ -73,8 +78,11 @@ def allowed_customization(_options = {})
     result = {"disabled" => "<None>"}
 
     case src[:vm].platform
-    when 'windows' then result["file"] = "Sysprep Answer File"
-    when 'linux'   then result["fields"] = "Specification"
+    when 'windows'
+      result["file"] = "Sysprep Answer File"
+      result["fields"] = "Sysprep Specification"
+    when 'linux'
+      result["fields"] = "Specification"
     end
 
     result