Add methods for for provider creation pluggable UI

Add a method indicating the properties required to create a Kubevirt
provider and implement the common self.verify_credentials interface
method.

ManageIQ/manageiq#18818

app/models/manageiq/providers/kubevirt/infra_manager.rb

@@ -53,6 +53,41 @@ def self.description
     @description ||= ManageIQ::Providers::Kubevirt::Constants::PRODUCT
   end
 
+  def self.params_for_create
+    @params_for_create ||= {
+      :title  => "Configure Kubevirt",
+      :fields => [
+        {
+          :component  => "text-field",
+          :name       => "endpoints.default.server",
+          :label      => "Hostname",
+          :isRequired => true,
+          :validate   => [{:type => "required-validator"}]
+        },
+        {
+          :component  => "text-field",
+          :name       => "endpoints.default.port",
+          :type       => "number",
+          :isRequired => true,
+          :validate   => [{:type => "required-validator"}]
+        },
+        {
+          :component => "text-field",
+          :name      => "endpoints.default.token",
+          :label     => "Token",
+          :type      => "password",
+          :isRequired => true,
+          :validate   => [{:type => "required-validator"}]
+        }
+      ]
+    }.freeze
+  end
+
+  def self.verify_credentials(args)
+    server, port, token = args.dig("endpoints", "default")&.values_at("server", "port", "token")
+    !!raw_connect(:server => server, :port => port, :token => token)
+  end
+
   #
   # This method from the dialog that adds a provider, to verify the connection details and the
   # credentials.
@@ -70,7 +105,7 @@ def self.raw_connect(opts)
     connection = Connection.new(
       :host  => opts[:server],
       :port  => opts[:port],
-      :token => opts[:token],
+      :token => MiqPassword.try_decrypt(opts[:token]),
     )
 
     # Verify that the connection works: