Enable ability to generate invoices without publishing

This adds a parameter to control invoice reporting, which defaults to false for
now (since we plan on manually adjusting the invoice next month).

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=193708323

java/google/registry/config/RegistryConfig.java

@@ -590,6 +590,18 @@ public final class RegistryConfig {
       return "gs://" + billingBucket;
     }
 
+    /**
+     * Returns whether or not we should publish invoices to partners automatically by default.
+     *
+     * @see google.registry.reporting.billing.BillingModule
+     */
+    @Provides
+    @Config("defaultShouldPublishInvoices")
+    public static boolean provideDefaultShouldPublishInvoices() {
+      // TODO(b/78278360): Make the default 'true' once we're done with SUNRISE.
+      return false;
+    }
+
     /**
      * Returns the list of addresses that receive monthly invoicing emails.
      *