Replace usage of `data.vertex` with `data.caip` in `xm_local.experiment.get_experiment`.
Replace usage of `data.vertex` with `data.caip` in `xm_local.experiment.get_experiment`.

PiperOrigin-RevId: 474015514
Change-Id: Ic4f6114fe53649ade159b0f1f99376032c4c9054
GitOrigin-RevId: 66fb061865efb2023ce603e1ad37926fdcd23881

deepmind/xmanager,deepmind/xmanager