Move code from sc-network-common back to sc-network (#13592)

* Move service tests to `client/network/tests`

These tests depend on `sc-network` and `sc-network-sync` so they should
live outside the crate.

* Move some configs from `sc-network-common` to `sc-network`

* Move `NetworkService` traits to `sc-network`

* Move request-responses to `sc-network`

* Remove more stuff

* Remove rest of configs from `sc-network-common` to `sc-network`

* Remove more stuff

* Fix warnings

* Update client/network/src/request_responses.rs

Co-authored-by: Dmitry Markin <dmitry@markin.tech>

* Fix cargo doc

---------

Co-authored-by: Dmitry Markin <dmitry@markin.tech>

substrate/Cargo.lock

@@ -8101,6 +8101,7 @@ dependencies = [
  "quickcheck",
  "rand 0.8.5",
  "sc-client-api",
+ "sc-network",
  "sc-network-common",
  "sp-api",
  "sp-authority-discovery",
@@ -8163,7 +8164,7 @@ dependencies = [
  "sc-chain-spec-derive",
  "sc-client-api",
  "sc-executor",
- "sc-network-common",
+ "sc-network",
  "sc-telemetry",
  "serde",
  "serde_json",
@@ -8751,6 +8752,7 @@ dependencies = [
  "futures-timer",
  "log",
  "sc-client-api",
+ "sc-network",
  "sc-network-common",
  "sp-blockchain",
  "sp-runtime",
@@ -8787,6 +8789,7 @@ dependencies = [
  "futures-timer",
  "ip_network",
  "libp2p",
+ "linked_hash_set",
  "log",
  "lru",
  "mockall",
@@ -8838,6 +8841,7 @@ dependencies = [
  "sc-block-builder",
  "sc-client-api",
  "sc-consensus",
+ "sc-network",
  "sc-network-common",
  "sp-blockchain",
  "sp-consensus",
@@ -8861,7 +8865,6 @@ dependencies = [
  "futures",
  "futures-timer",
  "libp2p",
- "linked_hash_set",
  "parity-scale-codec",
  "prost-build",
  "sc-consensus",
@@ -8890,6 +8893,7 @@ dependencies = [
  "log",
  "lru",
  "quickcheck",
+ "sc-network",
  "sc-network-common",
  "sc-peerset",
  "sp-runtime",
@@ -8911,6 +8915,7 @@ dependencies = [
  "prost",
  "prost-build",
  "sc-client-api",
+ "sc-network",
  "sc-network-common",
  "sc-peerset",
  "sp-blockchain",
@@ -8939,6 +8944,7 @@ dependencies = [
  "sc-block-builder",
  "sc-client-api",
  "sc-consensus",
+ "sc-network",
  "sc-network-common",
  "sc-peerset",
  "sc-utils",
@@ -8997,6 +9003,7 @@ dependencies = [
  "log",
  "parity-scale-codec",
  "pin-project",
+ "sc-network",
  "sc-network-common",
  "sc-peerset",
  "sc-utils",
@@ -9026,6 +9033,7 @@ dependencies = [
  "sc-block-builder",
  "sc-client-api",
  "sc-client-db",
+ "sc-network",
  "sc-network-common",
  "sc-peerset",
  "sc-transaction-pool",