Create GenerateAllocationTokens nomulus tool command

This creates a specified number of tokens of a given schema, with a dryrun option
to not persist them.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=181403775

java/google/registry/tools/RegistryToolComponent.java

@@ -83,6 +83,7 @@ interface RegistryToolComponent {
   void inject(CreateTldCommand command);
   void inject(DeployInvoicingPipelineCommand command);
   void inject(EncryptEscrowDepositCommand command);
+  void inject(GenerateAllocationTokensCommand command);
   void inject(GenerateApplicationsReportCommand command);
   void inject(GenerateDnsReportCommand command);
   void inject(GenerateEscrowDepositCommand command);