The @dataProvider annotation should be a static function, check and make data provider in the extension, at least:
- WikimediaLoadBalancerQueryServicePoolStatusProviderTest with getStatusProvider and getStatusInvalidJSONProvider
- WikimediaPrometheusQueryServiceLagProviderTest with getLagsProvider and getLagsInvalidJSONProvider
static and adjust the usages (More infos at T332865).
Initial work was done in d67f9a7fddea50808dfad7a6f04ff0fd7baa3c35