Adopt the new federation runtime #518
Description
Describe the feature
I have recently redesigned module federation and introduced the concept of runtime plugins, while they have many uses - i think the new runtime could be a prime candidate for repack as i recall we had to do some special things for ChunkManager, this could likely be moved into a runtime plugin and not require a full webpack plugin for federation to work (i do the same for node.js now too)
Motivation
More flexability to end user and most likely a cleaner implementation of federation for RN apps