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/beam/BUILD

@@ -6,4 +6,15 @@ licenses(["notice"])  # Apache 2.0
 
 java_library(
     name = "beam",
+    srcs = glob(["*.java"]),
+    deps = [
+        "@com_google_flogger",
+        "@com_google_flogger_system_backend",
+        "@com_google_guava",
+        "@org_apache_avro",
+        "@org_apache_beam_runners_direct_java",
+        "@org_apache_beam_runners_google_cloud_dataflow_java",
+        "@org_apache_beam_sdks_java_core",
+        "@org_apache_beam_sdks_java_io_google_cloud_platform",
+    ],
 )