Add preliminary spec11 monthly pipeline

This adds the scaffolding for a basic Spec11 pipeline- it gathers all domains from all time for a given project and counts how many there are. I've factored out a few common utilities for beam pipelines to avoid excessive duplication.

Future CLs will:
- Actually process domains via the SafeBrowsing API
- Generate a real spec11 report
- Template queries based on the input YearMonth
- Abstract more commonalities across beam pipelines to reduce boilerplate when adding new pipelines.

TESTED: FOSS test passed, and ran successfully on alpha

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=205997741

java/google/registry/tools/RegistryTool.java

@@ -54,6 +54,7 @@ public final class RegistryTool {
           .put("delete_reserved_list", DeleteReservedListCommand.class)
           .put("delete_tld", DeleteTldCommand.class)
           .put("deploy_invoicing_pipeline", DeployInvoicingPipelineCommand.class)
+          .put("deploy_spec11_pipeline", DeploySpec11PipelineCommand.class)
           .put("domain_application_info", DomainApplicationInfoCommand.class)
           .put("encrypt_escrow_deposit", EncryptEscrowDepositCommand.class)
           .put("execute_epp", ExecuteEppCommand.class)