[release/9.0] Don't execute empty batches (dotnet#34870)

Fixes dotnet#33337

Author: AndriySvyryd

src/EFCore.SqlServer/Migrations/SqlServerMigrationsSqlGenerator.cs

@@ -1426,8 +1426,11 @@ protected override void Generate(SqlOperation operation, IModel? model, Migratio
 
         void AppendBatch(string batch)
         {
-            builder.Append(batch);
-            EndStatement(builder, operation.SuppressTransaction);
+            if (!string.IsNullOrWhiteSpace(batch))
+            {
+                builder.Append(batch);
+                EndStatement(builder, operation.SuppressTransaction);
+            }
         }
     }
 
@@ -2524,7 +2527,7 @@ private IReadOnlyList<MigrationOperation> RewriteOperations(
                 {
                     // for create table we always generate new temporal information from the operation itself
                     // just in case there was a table with that name before that got deleted/renamed
-                    // this shouldn't happen as we re-use existin tables rather than drop/recreate
+                    // this shouldn't happen as we re-use existing tables rather than drop/recreate
                     // but we are being extra defensive here
                     // and also, temporal state (disabled versioning etc.) should always reset when creating a table
                     temporalInformation = BuildTemporalInformationFromMigrationOperation(schema, createTableOperation);

test/EFCore.SqlServer.FunctionalTests/Migrations/MigrationsInfrastructureSqlServerTest.cs

@@ -152,9 +152,6 @@ SELECT @Counter
 SELECT GetDate()
 GO
 
-
-GO
-
 INSERT INTO [__EFMigrationsHistory] ([MigrationId], [ProductVersion])
 VALUES (N'00000000000004_Migration4', N'7.0.0-test');
 GO
@@ -299,9 +296,6 @@ SELECT @Counter
 SELECT GetDate()
 GO
 
-
-GO
-
 INSERT INTO [__EFMigrationsHistory] ([MigrationId], [ProductVersion])
 VALUES (N'00000000000004_Migration4', N'7.0.0-test');
 GO