Don't try to run migrations on cleanup

Author: PawelGerr

src/Thinktecture.EntityFrameworkCore.SqlServer.Testing/EntityFrameworkCore/Testing/SqlServerTestDbContextProvider.cs

@@ -251,7 +251,7 @@ private void DisposeContextsAndRollbackMigrations()
       if (_isolationOptions.NeedsCleanup)
       {
          // Create a new ctx as a last resort to rollback migrations and clean up the database
-         using var ctx = _actDbContext ?? _arrangeDbContext ?? _assertDbContext ?? CreateDbContext(true);
+         using var ctx = _actDbContext ?? _arrangeDbContext ?? _assertDbContext ?? CreateDbContext(_masterDbContextOptions, new DbDefaultSchema(Schema));
 
          _isolationOptions.Cleanup(ctx, Schema);
       }