menu.entity.node.*.yml gets overriden on node_insert and menu install

Problem/Motivation

A module or an install profile may provide node type menu settings via menu.entity.node.*.yml. However these settings get overridden either in menu_node_type_insert() or menu_install()

Proposed resolution

Settings should be merged favoring the settings from the yml file.

Remaining tasks

User interface changes

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API changes

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