Move sc-client into sc-service (#5502)

* Drop client from sc-network and sc-client-db, move LongestChain to sc-client-api

* move leaves, cht, in_mem to sc-client-api, drop client from sc-finality-grandpa

* drop sc-service from sc-rpc

* drop sc-service from sc-consensus-aura

* drop sc-client from manual-seal and babe

* drop sc-client from utils/frame/rpc/system and utils/frame/benchmarking-cli

* drop sc-client from bin/node and bin/node-template

* drop sc-client

* fix tests

* remove check -p sc-client from gitlab.yml

* fix warnings

* fixes ui test

* fix light client tests

* adds associated Client type to AbstractService

* adds UsageProvider to Client

* fixed ui test, again

* tried and failed to get node-cli to compile for wasm

* thanks to tomaka for helping me get node-cli to compile for wasmm

* ui test pls pas 🙏🏾

* all tests passing 🪄

* no_run documentation code

* rm -f documentation code

* ClientProvider

* fix mega trait

* move LongestChain to sc-consensus, use adds minimal bounds to AbstractService::Client

* adds license to sc-consensus

Co-authored-by: Benjamin Kampmann <ben@parity.io>

substrate/client/api/src/backend.rs

@@ -79,6 +79,25 @@ pub struct ClientImportOperation<Block: BlockT, B: Backend<Block>> {
 	pub notify_finalized: Vec<Block::Hash>,
 }
 
+/// Helper function to apply auxiliary data insertion into an operation.
+pub fn apply_aux<'a, 'b: 'a, 'c: 'a, B, Block, D, I>(
+	operation: &mut ClientImportOperation<Block, B>,
+	insert: I,
+	delete: D,
+) -> sp_blockchain::Result<()>
+	where
+		Block: BlockT,
+		B: Backend<Block>,
+		I: IntoIterator<Item=&'a(&'c [u8], &'c [u8])>,
+		D: IntoIterator<Item=&'a &'b [u8]>,
+{
+	operation.op.insert_aux(
+		insert.into_iter()
+			.map(|(k, v)| (k.to_vec(), Some(v.to_vec())))
+			.chain(delete.into_iter().map(|k| (k.to_vec(), None)))
+	)
+}
+
 /// State of a new block.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum NewBlockState {