Add the DELTA_LENGTH_BYTE_ARRAY nz map consumer and a block-wide delta decode - #24639

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Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions-ecosystem/action-add-assignees@ce5019e63cc4f35aba27308dc88d19c8f3686747. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/