Integrate meta-seconorth-mtk/add-sconfig

Commit: seco-ne/yocto/layers/meta-seconorth-mtk@5f379095

core:base-files: Remove networkd configs

They are added in meta-rity layer, conflicting with sharedconf tool

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Commit: seco-ne/yocto/layers/meta-seconorth-mtk@1bd77184

conf:machine: Add seco-sharedconf recipes to MACHINE_ESSENTIAL_EXTRA_RDEPENDS

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Commit: seco-ne/yocto/layers/meta-seconorth-mtk@06517fca

seconorth:sharedconf: Add recipe from machine layer