Generate storage info for pallet authority_discovery (#9428)

* Migrate Aura pallet to BoundedVec

Implementing issue #8629

* Fixed aura tests after BoundedVec change

* Moved Vec to BoundedVec in authority-discovery

* Merging into the main branch

* Added MaxEncodedLen to crypto

Need this without full_crypto to be able to add generate_store_info

* Add generate_store_info for aura

* Adding changes to Slot to add MaxEncodedLen

* Adding generate_store_info to authority discovery

* fmt

* removing panics in runtime if vec size too large

* authority-discovery: Remove panics in runtime
Can happen if vec size is too large, so truncate the vec in that case

* Adding logging when I truncate Vecs

* Got the sign the other way around

* Reverting pallet_aura changes
This is already being addressed by PR #9371

* Change BoundedVec to WeakBoundedVec

More robust implementation following @thiolliere recommendation.

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

substrate/bin/node/runtime/src/lib.rs

@@ -883,6 +883,7 @@ parameter_types! {
 	pub const ImOnlineUnsignedPriority: TransactionPriority = TransactionPriority::max_value();
 	/// We prioritize im-online heartbeats over election solution submission.
 	pub const StakingUnsignedPriority: TransactionPriority = TransactionPriority::max_value() / 2;
+	pub const MaxAuthorities: u32 = 100;
 }
 
 impl<LocalCall> frame_system::offchain::CreateSignedTransaction<LocalCall> for Runtime
@@ -955,7 +956,9 @@ impl pallet_offences::Config for Runtime {
 	type OnOffenceHandler = Staking;
 }
 
-impl pallet_authority_discovery::Config for Runtime {}
+impl pallet_authority_discovery::Config for Runtime {
+	type MaxAuthorities = MaxAuthorities;
+}
 
 impl pallet_grandpa::Config for Runtime {
 	type Event = Event;