Spring Clearly document that DataClassRowMapper supports Java records

The current Javadoc for DataClassRowMapper is a bit vague and does not spell out that it actually supports Java records.

We should improve the documentation to make that clear.

In addition, we should improve the documentation for BeanPropertyRowMapper by explaining when DataClassRowMapper would be a better choice (i.e., for records or Kotlin data classes) -- the current @see DataClassRowMapper is not really sufficient for that.