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/BUILD

@@ -36,6 +36,7 @@ java_library(
     deps = [
         "//java/google/registry/backup",
         "//java/google/registry/beam/invoicing",
+        "//java/google/registry/beam/spec11",
         "//java/google/registry/bigquery",
         "//java/google/registry/config",
         "//java/google/registry/dns",