feat: unified orchestrator templates

[mo-getter]

Rationale

FiftyOne is adding service-based orchestrators (kubernetes-service environment: long-lived, on-demand service pods) alongside the existing job-based delegated operators, and deployments need to configure both. youcef/service-orchestrator-chart built the foundations for this — the service pod template, the orchestrator-seeding Job, and the builtin-services overrides — as a parallel configuration surface (its own ConfigMaps, values trees, and a hand-authored orchestrator registration list).

This PR lands that functionality unified under the existing delegatedOperatorJobTemplates pattern instead, so operators configure job- and service-based orchestrators one way, and the chart diff against main stays as small and reviewable as possible.

Review Priority

• high
• medium
• low

Changes

• delegatedOperatorJobTemplates.services replaces the standalone pod-template ConfigMap. Each entry renders a jinja2 Pod manifest into the same do-templates ConfigMap as jobs, merged over template with the same logic — and since that ConfigMap is already mounted at /tmp/do-targets, no new teams-api wiring is needed.
• Registrations are derived, not hand-authored. template.registerOrchestrator (default true, overridable per entry) replaces the explicit seedOrchestrators.orchestrators list: instance_id = entry name, execution_tmpl_uri = the entry's file, merged worker image for jobs, available_operators pinned to run_service for services. This also retires the DEFAULT_WORKER_IMAGE image-sentinel, since helm renders the concrete merged image per entry.
• The chart owns the pod shape. Service sizing and node targeting come from the values merge (like jobs); the broker's resource_requests vars are deliberately not consumed. Different sizes = different services entries.
• Smaller interface. The seedOrchestrators values section is gone — the seeding Job hardcodes its mechanics and follows delegatedOperatorJobTemplates.template.image.

Upgrade note: deployments with existing jobs entries will seed registrations named after those entries on first upgrade (idempotent upserts after). Opt out with template.registerOrchestrator: false.

Checklist

• This PR maintains parity between Docker Compose and Helm

Testing

• New/extended terratest suites: service Pod rendering (merge semantics, broker vars, telemetry on/off, sizing ownership), seeding gating matrix and derived ORCHESTRATORS JSON, builtinServices ConfigMap, teams-api wiring.
• Full helm unit suite and all pre-commit hooks pass; values.schema.json and README regenerated; full-chart helm template verified with jobs + services + builtinServices values.

Note

Ephem testing in progress.

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