Bug#1099927: r-cran-testthat does not actually break other packages

[Rebecca N. Palmer]

r-cran-testthat 3.2.1.1-1 had a bug (*possibly* 
https://github.com/r-lib/testthat/issues/1997 ) where some kinds of test 
failure would print a failure message but return a non-error state, 
causing autopkgtests to "pass" when they shouldn't.  r-cran-testthat 
3.2.3-1 fixes this bug.

This exposes some pre-existing bugs in other packages, specifically 
r-cran-hdf5r, r-cran-rcmdcheck and r-cran-s2.  All of these occur only 
on a 32-bit architecture.  Because these aren't really new bugs, 
blocking r-cran-testthat migration over them doesn't actually help.