TST/CI: xfail test_round_sanity for 32 bit
- [x] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).

xfailing just to get the CI to green. Might be addressable in the future cc @jbrockmendel 

Going to merge this to get the CI back to green. Will open an issue to investigate this issue. Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

```
git checkout 1.4.x
git pull
```

2. Cherry pick the first parent branch of the this PR on top of the older branch:
```
git cherry-pick -x -m1 8c7b0b268436cb4b3755de8d7cb9447957ec2bf8
```

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

```
git commit -am 'Backport PR #47803: TST/CI: xfail test_round_sanity for 32 bit'
```

4. Push to a named branch:

```
git push YOURFORK 1.4.x:auto-backport-of-pr-47803-on-1.4.x
```

5. Create a PR against branch 1.4.x, I would have named this PR:

> "Backport PR #47803 on branch 1.4.x (TST/CI: xfail test_round_sanity for 32 bit)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the `Still Needs Manual Backport` label once the PR gets merged.

If these instructions are inaccurate, feel free to [suggest an improvement](https://github.com/MeeseeksBox/MeeseeksDev).
                 xref https://github.com/pandas-dev/pandas/issues/47823