XD-1849 Move batch jobs configurations endpoint

- Move REST endpoint `/batch/jobs` to `/jobs/configurations`
- Fix admin UI
- Fix tests
- Move `jobs/executions` endpoint tests into `BatchJobExecutionsControllerIntegrationTests`
XD-1849 Move instances by jobName endpoint

- Move from `/batch/jobs/{jobName}/instances` to `/jobs/instances?jobname={jobName}`
- Move test
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