Tests

[ENH] refactor `OpenML` classes to inherit `ReprMixin` for default `repr`, instead of copy-paste #2430

Job	Run time
docker	3s
(windows-latest, Py, sk0.24.*, sk-only:false)	3s
(ubuntu-latest, Py3.8, sk0.23.1, sk-only:false)	2s
(ubuntu-latest,Py3.11,sk1.4.*,sk-only:true)	55s
(ubuntu-latest,Py3.11,sk1.3.*,sk-only:true)	1m 1s
(ubuntu-latest,Py3.12,sk1.5.*,sk-only:true)	1m 6s
(ubuntu-latest,Py3.12,sk1.6.*,sk-only:true)	1m 5s
(ubuntu-latest,Py3.10,sk1.6.*,sk-only:true)	1m 2s
(ubuntu-latest,Py3.12,sk1.4.*,sk-only:true)	59s
(ubuntu-latest,Py3.11,sk1.5.*,sk-only:true)	56s
(ubuntu-latest,Py3.12,sk1.7.*,sk-only:true)	1m 9s
(ubuntu-latest,Py3.10,sk1.3.*,sk-only:true)	55s
(ubuntu-latest,Py3.11,sk1.7.*,sk-only:true)	1m 6s
(ubuntu-latest,Py3.10,sk1.5.*,sk-only:true)	54s
(ubuntu-latest,Py3.12,sk1.3.*,sk-only:true)	58s
(ubuntu-latest,Py3.10,sk1.4.*,sk-only:true)	55s
(ubuntu-latest,Py3.10,sk1.7.*,sk-only:true)	1m 5s
(ubuntu-latest,Py3.13,sk1.5.*,sk-only:true)	1m 12s
(ubuntu-latest,Py3.14,sk1.7.*,sk-only:true)	1m 39s
(ubuntu-latest,Py3.14,sk1.6.*,sk-only:true)	4m 18s
(ubuntu-latest,Py3.11,sk1.6.*,sk-only:true)	57s
(ubuntu-latest,Py3.12,sk1.5.*,sk-only:false)	6m 39s
(ubuntu-latest,Py3.12,sk1.5.,pd:2.,sk-only:false)	3m 0s
(ubuntu-latest,Py3.13,sk1.6.*,sk-only:true)	55s
(ubuntu-latest,Py3.14,sk1.7.*,sk-only:false)	2m 47s
(ubuntu-latest,Py3.14,sk1.5.*,sk-only:true)	4m 14s
(ubuntu-latest,Py3.13,sk1.7.*,sk-only:true)	57s
(windows-latest,Py3.12,sk1.5.*,sk-only:false)	4m 24s
	45m 16s

Provide feedback