Add missing fields to the light sync state (#7225)

* Initial draft

* Add an iterator that helps us get most items

* Revert changes to grandpa

* Change fields to just be the grandpa authority set and babe epoch changes

* Only use the fields we need from the shared authority set

* Switch to RPC call

* Revert "Only use the fields we need from the shared authority set"

This reverts commit 6ede87b0c5fe53f251d7cb45951006a7dc8f9b83.

* Add babe_finalized_block_weight from `ashley-improve-sync-state-WIP-loading`

* Fix rpc test

* Move sync state rpc stuff into sc-sync-state-rpc

* Remove as_json_value and remove unwraps from sc-sync-state-rpc

* Add clone_inner to SharedAuthoritySet

substrate/Cargo.lock

@@ -3826,6 +3826,7 @@ dependencies = [
  "node-runtime",
  "pallet-contracts-rpc",
  "pallet-transaction-payment-rpc",
+ "sc-chain-spec",
  "sc-client-api",
  "sc-consensus-babe",
  "sc-consensus-babe-rpc",
@@ -3835,6 +3836,7 @@ dependencies = [
  "sc-keystore",
  "sc-rpc",
  "sc-rpc-api",
+ "sc-sync-state-rpc",
  "sp-api",
  "sp-block-builder",
  "sp-blockchain",
@@ -6315,11 +6317,15 @@ dependencies = [
  "impl-trait-for-tuples",
  "parity-scale-codec",
  "sc-chain-spec-derive",
+ "sc-consensus-babe",
+ "sc-consensus-epochs",
+ "sc-finality-grandpa",
  "sc-network",
  "sc-telemetry",
  "serde",
  "serde_json",
  "sp-chain-spec",
+ "sp-consensus-babe",
  "sp-core",
  "sp-runtime",
 ]
@@ -6357,6 +6363,9 @@ dependencies = [
  "regex",
  "rpassword",
  "sc-client-api",
+ "sc-consensus-babe",
+ "sc-consensus-epochs",
+ "sc-finality-grandpa",
  "sc-informant",
  "sc-keystore",
  "sc-network",
@@ -7284,6 +7293,24 @@ dependencies = [
  "sp-core",
 ]
 
+[[package]]
+name = "sc-sync-state-rpc"
+version = "0.8.0"
+dependencies = [
+ "jsonrpc-core",
+ "jsonrpc-core-client",
+ "jsonrpc-derive",
+ "sc-chain-spec",
+ "sc-client-api",
+ "sc-consensus-babe",
+ "sc-consensus-epochs",
+ "sc-finality-grandpa",
+ "sc-rpc-api",
+ "serde_json",
+ "sp-blockchain",
+ "sp-runtime",
+]
+
 [[package]]
 name = "sc-telemetry"
 version = "2.0.0"
@@ -7570,9 +7597,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.56"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3433e879a558dde8b5e8feb2a04899cf34fdde1fafb894687e52105fc1162ac3"
+checksum = "a230ea9107ca2220eea9d46de97eddcb04cd00e92d13dda78e478dd33fa82bd4"
 dependencies = [
  "itoa",
  "ryu",