Make bags-list generic over node value and instantiable (#10997)

* make instantiable

* update

* cargo fmt

* Clean up

* bags-list: Make it generic over node value

* Respond to some feedback

* Apply suggestions from code review

Co-authored-by: Kian Paimani <[email protected]>

* Add back default impl for weight update worst case

* Update to Score in more places'

* Use VoteWeight, not u64 to reduce test diff

* FMT

* FullCodec implies Codec

* formatting

* Fixup bags list remote test

Co-authored-by: doordashcon <[email protected]>
Co-authored-by: Doordashcon <[email protected]>
Co-authored-by: Kian Paimani <[email protected]>