[BUG] PUT Alias creates index and not an alias

[vrecan]

What is the bug?

When creating aliases it returns successful but actually creates an index instead.

How can one reproduce the bug?

resp, err := b.openSearch.Indices.Alias.Put(context.Background(), opensearchapi.AliasPutReq{
		Alias:   alias,
	})
	b.logger.Info("Created alias", slog.Any("response", resp))
	return err

What is the expected behavior?

An alias is created

What is your host/environment?

osx

Do you have any screenshots?

Do you have any additional context?

[dblock]

Want to try and write a (failing) test + fix for this @vrecan?