docs: document separate datanode query and ingestion runtimes

[Copilot]

What's Changed in this PR

GreptimeDB introduced separate datanode runtimes for query and ingestion paths, and the configuration docs needed to reflect those new runtime knobs. This PR updates the nightly deployment/configuration docs (EN + ZH) to document the new runtime fields and their defaults.

Describe the change in this PR

• Datanode runtime options (nightly EN docs)

  • Added runtime.query_rt_size and runtime.ingest_rt_size to the Datanode-only configuration example and option table.
  • Documented default behavior:
    • query_rt_size: max(num_cpus - 1, 1)
    • ingest_rt_size: number of CPU cores

• Datanode runtime options (nightly ZH docs)

  • Added the same runtime.query_rt_size and runtime.ingest_rt_size entries in the Chinese counterpart.
  • Kept key naming aligned with runtime config conventions in the section (grpc.runtime_size).

[runtime]
query_rt_size = 7
ingest_rt_size = 8

Checklist

• Please confirm that all corresponding versions of the documents have been revised.
• Please ensure that the content in sidebars.ts matches the current document structure when you changed the document structure.
• This change requires follow-up update in localized docs.

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[Copilot]

Pull request overview

Updates the nightly configuration documentation to reflect GreptimeDB’s split datanode runtimes for query vs ingestion, documenting the new runtime.query_rt_size and runtime.ingest_rt_size knobs (including defaults) in both English and Chinese docs.

Changes:

• Extended the Datanode-only configuration TOML example to include a new [runtime] section with query_rt_size and ingest_rt_size.
• Added corresponding entries to the Datanode-only configuration option table, including documented default behaviors.
• Aligned the Chinese doc’s gRPC runtime key naming with grpc.runtime_size in the Datanode-only table.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
docs/user-guide/deployments-administration/configuration.md	Adds [runtime] datanode runtime sizing example and documents runtime.query_rt_size / runtime.ingest_rt_size defaults in the Datanode-only section.
i18n/zh/docusaurus-plugin-content-docs/current/user-guide/deployments-administration/configuration.md	Mirrors the same runtime options in ZH nightly docs and aligns the gRPC runtime key naming in the Datanode-only table.

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