Add Cluster.Sharding journal migration adapter convernience method (#226)

* Add Cluster.Sharding journal migration adapter convernience method

* Update API Verify list

Author: Arkatufus

src/Akka.Hosting.API.Tests/verify/CoreApiSpec.ApprovePersistence.verified.txt

@@ -3,6 +3,8 @@ namespace Akka.Persistence.Hosting
 {
     public static class AkkaPersistenceHostingExtensions
     {
+        public static Akka.Hosting.AkkaConfigurationBuilder WithClusterShardingJournalMigrationAdapter(this Akka.Hosting.AkkaConfigurationBuilder builder, Akka.Persistence.Hosting.JournalOptions journalOptions) { }
+        public static Akka.Hosting.AkkaConfigurationBuilder WithClusterShardingJournalMigrationAdapter(this Akka.Hosting.AkkaConfigurationBuilder builder, string journalId) { }
         public static Akka.Hosting.AkkaConfigurationBuilder WithInMemoryJournal(this Akka.Hosting.AkkaConfigurationBuilder builder) { }
         public static Akka.Hosting.AkkaConfigurationBuilder WithInMemoryJournal(this Akka.Hosting.AkkaConfigurationBuilder builder, System.Action<Akka.Persistence.Hosting.AkkaPersistenceJournalBuilder> journalBuilder, string journalId = "inmem", bool isDefaultPlugin = true) { }
         public static Akka.Hosting.AkkaConfigurationBuilder WithInMemorySnapshotStore(this Akka.Hosting.AkkaConfigurationBuilder builder, string snapshotStoreId = "inmem", bool isDefaultPlugin = true) { }

src/Akka.Persistence.Hosting/AkkaPersistenceHostingExtensions.cs

@@ -251,5 +251,39 @@ class = ""Akka.Persistence.Snapshot.MemorySnapshotStore, Akka.Persistence""
 
             return builder.AddHocon(liveConfig, HoconAddMode.Prepend);
         }
+
+        /// <summary>
+        /// Adds the Akka.NET v1.4 to v1.5 Akka.Cluster.Sharding persistence event migration adapter to a journal.
+        /// </summary>
+        /// <param name="builder">The builder instance being configured.</param>
+        /// <param name="journalOptions">The specific journal options instance used by Akka.Cluster.Sharding persistence. For example, an instance of <c>SqlServerJournalOptions</c></param>
+        /// <returns>The same <see cref="AkkaConfigurationBuilder"/> instance originally passed in.</returns>
+        public static AkkaConfigurationBuilder WithClusterShardingJournalMigrationAdapter(
+            this AkkaConfigurationBuilder builder,
+            JournalOptions journalOptions)
+            => builder.WithClusterShardingJournalMigrationAdapter(journalOptions.PluginId);
+
+        /// <summary>
+        /// Adds the Akka.NET v1.4 to v1.5 Akka.Cluster.Sharding persistence event migration adapter to a journal.
+        /// </summary>
+        /// <param name="builder">The builder instance being configured.</param>
+        /// <param name="journalId">The specific journal identifier used by Akka.Cluster.Sharding persistence. For example, "akka.persistence.journal.sql-server"</param>
+        /// <returns>The same <see cref="AkkaConfigurationBuilder"/> instance originally passed in.</returns>
+        public static AkkaConfigurationBuilder WithClusterShardingJournalMigrationAdapter(
+            this AkkaConfigurationBuilder builder,
+            string journalId)
+        {
+            var config = @$"{journalId} {{
+     event-adapters {{
+        coordinator-migration = ""Akka.Cluster.Sharding.OldCoordinatorStateMigrationEventAdapter, Akka.Cluster.Sharding""
+    }}
+
+    event-adapter-bindings {{
+        ""Akka.Cluster.Sharding.ShardCoordinator+IDomainEvent, Akka.Cluster.Sharding"" = coordinator-migration
+    }}
+}}";
+            return builder.AddHocon(config, HoconAddMode.Prepend);
+        }
+        
     }
 }