Provide richer info about nodes in mutations

Currently mutations request `is_primary` & `is_secondary` nodes from node_factory. Possibly that's too specific design.

The issue is to make it more universal.

Imagine custom mutations that want to request new nodes from the node_factory based on other topological features (e.g. `is_final`).

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Общий вопрос - стоит ли так жестко передавать в get_node именно is_primary? Вдруг будет нужно например "is_final" и тд.

Мб реализовать какую-то структуру с описанием топологических свойств узла в графе?

_Originally posted by @nicl-nno in https://github.com/aimclub/GOLEM/pull/55#discussion_r1122925067_