Network sync refactoring (part 7) (#12006)

* Move `MultiaddrWithPeerId` and related parsing functions into `sc-network-common`, remove dependency on `sc-network` from `sc-chain-spec`

* Remove dependency on `sc-network` from `sc-offchain`

* Remove dependency on `sc-network` from `sc-network-gossip`

substrate/Cargo.lock

@@ -7730,7 +7730,6 @@ dependencies = [
  "quickcheck",
  "rand 0.7.3",
  "sc-client-api",
- "sc-network",
  "sc-network-common",
  "sp-api",
  "sp-authority-discovery",
@@ -7793,7 +7792,7 @@ dependencies = [
  "memmap2 0.5.0",
  "parity-scale-codec",
  "sc-chain-spec-derive",
- "sc-network",
+ "sc-network-common",
  "sc-telemetry",
  "serde",
  "serde_json",
@@ -8426,6 +8425,7 @@ dependencies = [
  "prost-build",
  "sc-consensus",
  "sc-peerset",
+ "serde",
  "smallvec",
  "sp-consensus",
  "sp-finality-grandpa",
@@ -8445,8 +8445,8 @@ dependencies = [
  "log",
  "lru",
  "quickcheck",
- "sc-network",
  "sc-network-common",
+ "sc-peerset",
  "sp-runtime",
  "substrate-prometheus-endpoint",
  "substrate-test-runtime-client",
@@ -8547,6 +8547,7 @@ dependencies = [
  "hyper",
  "hyper-rustls",
  "lazy_static",
+ "libp2p",
  "num_cpus",
  "once_cell",
  "parity-scale-codec",
@@ -8555,8 +8556,8 @@ dependencies = [
  "sc-block-builder",
  "sc-client-api",
  "sc-client-db",
- "sc-network",
  "sc-network-common",
+ "sc-peerset",
  "sc-transaction-pool",
  "sc-transaction-pool-api",
  "sc-utils",
@@ -8610,6 +8611,7 @@ dependencies = [
  "sc-chain-spec",
  "sc-client-api",
  "sc-network",
+ "sc-network-common",
  "sc-rpc-api",
  "sc-tracing",
  "sc-transaction-pool",