The top-level `schedulerName` value only ever configured the pod spec of the Gitea Deployment, but was declared
next to chart-wide settings. Moving it into the `deployment` dict completes the consolidation already done for
`affinity`, `dnsConfig`, `nodeSelector`, `priorityClassName`, `resources`, `tolerations` and
`topologySpreadConstraints`, so every pod scheduling setting now lives in one predictable place.
A deprecation check fails the release when the removed top-level value is still set. Silently ignoring it would
be hard to debug: the pod would fall back to the `default-scheduler` without any warning, bypassing the custom
scheduler the user relies on for placement decisions such as storage locality.
BREAKING CHANGE: `schedulerName` no longer exists. Use `deployment.schedulerName` instead. Installations that
still set `schedulerName` will fail unless `checkDeprecation` is set to `false`.
Co-authored-by: Copilot <copilot@github.com>