Spring Upgrade client support to R2DBC 1.0

This is a follow up to #28059.

Since R2DBC 1.0 has been released, we should upgrade and ensure compatibility with 1.0 for Spring Framework 6.0.

For example, io.r2dbc.spi.Result.getRowsUpdated() returned Publisher<Integer> in 0.9 and apparently returns Publisher<Long> in 1.0.