Add Dataflow path to generate overall monthly invoice

This forks off the results of the billing_events query from Bigquery and generates the overall invoice for the month.

This also turns the ad hoc beam binary into a proper Nomulus command, allowing us to @Inject from the RegsistryToolComponent and thus template the BillingEvent Bigquery query.

Next steps:
- Add the beam package to the open source build
  - That will likely require updates to the open source jars, since I'm using features from 2.2.0 which was only just released.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=178798943

java/google/registry/tools/RegistryToolComponent.java

@@ -81,6 +81,7 @@ interface RegistryToolComponent {
   void inject(CreateDomainCommand command);
   void inject(CreateLrpTokensCommand command);
   void inject(CreateTldCommand command);
+  void inject(DeployInvoicingPipelineCommand command);
   void inject(EncryptEscrowDepositCommand command);
   void inject(GenerateApplicationsReportCommand command);
   void inject(GenerateDnsReportCommand command);