Adds nondeterministic and sometimes failing IVF_FLAT unit test

[jparismorgan]

What

Adds a nondeterministic and sometimes failing IVF_FLAT unit test: https://tiledb.slack.com/archives/C0537B4V7Q8/p1702312614334709

[lums658]

This seems fine. Note that the error condition exposed by this test has a fix. In tdb_partitioned_matrix.h add

auto next_part_size = indices_[parts_[i] + 1] - indices_[parts_[i]];

// ADD ME
if (next_part_size == 0) {
  continue;
}

if ((std::get<1>(col_view_) + next_part_size) >
     std::get<0>(col_view_) + max_cols_) {
  break;
}

[jparismorgan]

Thanks, I think I will close this PR and re-open it alongside with the fix and some better testing and code setup.