Backport PR #60318 on branch 2.3.x (TST (string dtype): resolve all xfails in JSON IO tests)
Backport of https://github.com/pandas-dev/pandas/pull/60318
FWIW please link the backport PR and the original PR, and especially remove the "Still Needs Manual Backport" label once you open the backport PR, so we can keep a bit track of what is backported / still needs to be backported

And thanks for the backports!