Add batch operations support to `JdbcClient`

[sdeleuze]

Similar to #33812 but for JdbcClient.

[matt-locker]

@sdeleuze
For replacing JdbcTemplate, this is the last remaining bit :)
Any chance this will land also on 6.x?

[sdeleuze]

Likely not, too involved, but let's confirm when implemented in 7.x.

[fmbenhassine]

This would be beneficial for Spring Batch as we intend to replace JdbcTemplate usage with JdbcClient, see spring-projects/spring-batch#4897

Great to see that this is planned for SF 7.1.x, it would be great to have it in Batch 6.1 which will be based on SF 7.1.