Add reporting retry, emailing and better logging

This change:
- Adds retries to the staging action
- Emails domain-registry-eng@ upon completion of either action
- Simplifies logging to be more useful

TODO: fix up Module @Inject naming conventions and yearMonth injection

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=173294822

java/google/registry/config/RegistryConfigSettings.java

@@ -115,6 +115,8 @@ public class RegistryConfigSettings {
   public static class IcannReporting {
     public String icannTransactionsReportingUploadUrl;
     public String icannActivityReportingUploadUrl;
+    public String icannReportingEmailSenderDomain;
+    public String icannReportingEmailRecipient;
   }
 
   /** Configuration for Registry Data Escrow (RDE). */