* expunge legacy code from polkadot-network
* mostly rip out old legacy protocol from service
* ensure validation work is spawned by incoming messages
* decouple availabliity store from network logic; clean up data flow
* av_store: test helpers and use futures-abort
* update polkadot-validation to pass n_validators when submitting chunks
* fallible erasure-chunk fetching
* implement `ErasureNetworking` for new network prot
* API for registering availability store in network
* fully integrate new network service into service
* fix validation tests
* scaffolding for porting collator over to new network
* track connected validators' peer IDs and distribute collators' collations
* helper in network for fetching all checked statements
* fix adder-collator
* actually register notifications protocol
* Update service/src/lib.rs
* merge with master
* encode the candidate statement as only the hash
* refactor CandidateReceipt and CollationInfo
* introduce an abridged candidate receipt type
* erasure coding stores candidate receipt
* store omitted data instead and introduce AvailableData type
* refactor availability-store schema
* tweak schema and APIs a bit more
* get availability-store tests passing
* accept AbridgedCandidateReceipt in `set_heads`
* change statement type in primitives to be hash-only
* fix parachains runtime tests
* fix bad merge
* rewrite validation pipeline
* remove evaluation module
* use abridged candidate hash as canonical
* statement table uses abridged candidate receipts
* kill availability_store::Data struct
* port shared table to new validation pipelines
* extract full validation pipeline to helper
* remove old validation pipeline from collation module
* polkadot-validation compiles
* polkadot-validation tests compile
* make local collation available in validation service
* port legacy network code
* polkadot-network fully ported
* network: ensure fresh statement is propagated
* remove pov_block_hash from LocalValidationData
* remove candidate_hash field from AttestedCandidate and update runtime
* port runtimes to new ParachainHost definition
* port over polkadot-collator
* fix test compilation
* better fix
* remove unrelated validation work dispatch fix
* address grumbles
* fix equality check
Robert Habermeier