Complete Joda-Time to java.time migration (#3039)

This completes the exhaustive refactoring of foundational temporal types from Joda-Time to the native java.time API across the entire codebase.

- Replaced org.joda.time.DateTime, Instant, LocalDate, and Duration with java.time equivalents.
- Audited and updated Clock implementations (FakeClock, SystemClock). Added nowMillis(), nowDate(), and nowDateTime() to eliminate repetitive conversions and maintain parallel naming.
- Replaced ZonedDateTime with OffsetDateTime globally per go/avoid-zdt. OffsetDateTime is a better fit as we use a hardcoded ZoneOffset.UTC throughout the system, making geographical time zone rules (like daylight saving time) irrelevant and preventing serialization ambiguities. Added a presubmit check.
- Completely removed all transitional bridge methods from DateTimeUtils and deleted obsolete converters (e.g., DateTimeConverter).
- Updated testing infrastructure, Apache Beam pipelines, custom JCommander parameters, and networking modules to solely rely on java.time primitives.
- Retained the lone necessary org.joda.time.Instant usage in SafeBrowsingTransforms required by the Apache Beam API.
- Cleared Gradle lockfiles and removed the joda-time dependency entirely from the build configuration.

db/src/main/resources/sql/flyway/V113__add_host_missing_indexes.sql

@@ -15,4 +15,3 @@
 CREATE INDEX IDXy98mebut8ix1v07fjxxdkqcx ON "Host" (creation_time);
 CREATE INDEX IDXovmntef6l45tw2bsfl56tcugx ON "Host" (deletion_time);
 CREATE INDEX IDXl49vydnq0h5j1piefwjy4i8er ON "Host" (current_sponsor_registrar_id);
-

db/src/main/resources/sql/flyway/V123__drop_unused_columns_in_billing_cancellation_table.sql

@@ -16,4 +16,3 @@ ALTER TABLE "BillingCancellation" DROP COLUMN billing_event_domain_repo_id;
 ALTER TABLE "BillingCancellation" DROP COLUMN billing_event_history_id;
 ALTER TABLE "BillingCancellation" DROP COLUMN billing_recurrence_domain_repo_id;
 ALTER TABLE "BillingCancellation" DROP COLUMN billing_recurrence_history_id;
-

db/src/main/resources/sql/flyway/V125__create_package_promotion.sql

@@ -25,4 +25,3 @@
     );
 
 create index IDXlg6a5tp70nch9cp0gc11brc5o on "PackagePromotion" (token);
-

db/src/main/resources/sql/flyway/V129__create_allocateId_sequence_alternative.sql

@@ -18,4 +18,3 @@ CREATE SEQUENCE public."project_wide_unique_id_seq"
     MINVALUE 59880480005
     NO MAXVALUE
     CACHE 10;
-

db/src/main/resources/sql/flyway/V130__add_login_email_column_to_registrarpoc.sql

@@ -14,4 +14,3 @@
 
 alter table "RegistrarPoc" add column login_email_address text;
 create index registrarpoc_login_email_idx on "RegistrarPoc" (login_email_address);
-

db/src/main/resources/sql/flyway/V132__drop_gae_user_id_from_registrar_poc.sql

@@ -13,4 +13,3 @@
 -- limitations under the License.
 
 ALTER TABLE "RegistrarPoc" DROP COLUMN gae_user_id;
-

db/src/main/resources/sql/flyway/V140__rename_process_time_column_in_dns_refresh_request_table.sql

@@ -15,6 +15,3 @@
 ALTER TABLE "DnsRefreshRequest" RENAME COLUMN process_time TO last_process_time;
 CREATE INDEX IDXfdk2xpil2x1gh0omt84k2y3o1 ON "DnsRefreshRequest" (last_process_time);
 DROP INDEX IDX3i7i2ktts9d7lcjbs34h0pvwo;
-
-
-

db/src/main/resources/sql/flyway/V142__drop_request_log_id.sql

@@ -13,4 +13,3 @@
 -- limitations under the License.
 
 ALTER TABLE "Lock" DROP COLUMN request_log_id;
-

db/src/main/resources/sql/flyway/V147__drop_gaia_id_from_user.sql

@@ -13,4 +13,3 @@
 -- limitations under the License.
 
 ALTER TABLE "User" DROP COLUMN gaia_id;
-

db/src/main/resources/sql/flyway/V25__rename_vkey_fields.sql

@@ -19,4 +19,3 @@ ALTER TABLE "DomainHost"
   ADD CONSTRAINT FK_DomainHost_host_valid
   FOREIGN KEY (ns_hosts)
   REFERENCES "HostResource";
-

db/src/main/resources/sql/flyway/V43__update_relock_duration_type.sql

@@ -15,4 +15,3 @@
 ALTER TABLE "RegistryLock" DROP COLUMN relock_duration;
 
 ALTER TABLE "RegistryLock" ADD COLUMN relock_duration interval;
-

db/src/main/resources/sql/flyway/V80__defer_bill_event_key.sql

@@ -24,4 +24,3 @@ ALTER TABLE if exists "Domain"
    FOREIGN KEY (transfer_billing_event_id)
    REFERENCES "BillingEvent"
    DEFERRABLE INITIALLY DEFERRED;
-

db/src/main/resources/sql/flyway/V89__host_history_host_deferred.sql

@@ -22,4 +22,3 @@ ALTER TABLE "HostHistory" ADD CONSTRAINT fk_hosthistory_host
     FOREIGN KEY (host_repo_id)
     REFERENCES "Host"(repo_id)
     DEFERRABLE INITIALLY DEFERRED;
-

db/src/main/resources/sql/flyway/V95__add_contacts_indexes_on_domain.sql

@@ -19,4 +19,3 @@ create index IDXq9gy8x2xynt9tb16yajn1gcm8 on "Domain" (billing_contact);
 create index IDXr22ciyccwi9rrqmt1ro0s59qf on "Domain" (tech_contact);
 
 create index IDXa7fu0bqynfb79rr80528b4jqt on "Domain" (registrant_contact);
-