Add missing deprecation warnings for workers section

[Miretpl]

related: #28880

This PR added deprecation warnings for all sections already moved to workers.celery/workers.kubernetes sections from workers.

Follow-up to discussion in #61957

Deprecated fields/sections under workers:

1. workers.command
2. workers.securityContexts
3. workers.containerLifecycleHooks
4. workers.kerberosSidecar
5. workers.kerberosInitContainer
6. workers.terminationGracePeriodSeconds
7. workers.nodeSelector

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