Fix recursive trait bounds exposed with rustc 1.75.0

cargo llvm-cov was hitting this issue:

error[E0275]: overflow evaluating the requirement `<Runtime as pallet_grandpa::Config>::KeyOwnerProof == _`

which is documented upstream in
rust-lang/rust#117211
paritytech/polkadot-sdk#2641

and fixed in polkadot-sdk v1.6.0 and later, see
paritytech/polkadot-sdk#2644

runtime/src/lib.rs

@@ -275,7 +275,7 @@ impl pallet_grandpa::Config for Runtime {
     type MaxAuthorities = MaxAuthorities;
     type MaxNominators = MaxNominatorRewardedPerValidator;
     type MaxSetIdSessionEntries = ();
-    type KeyOwnerProof = <Historical as KeyOwnerProofSystem<(KeyTypeId, GrandpaId)>>::Proof;
+    type KeyOwnerProof = sp_session::MembershipProof;
     type EquivocationReportSystem =
         pallet_grandpa::EquivocationReportSystem<Self, Offences, Historical, ReportLongevity>;
 }
@@ -484,7 +484,7 @@ impl pallet_babe::Config for Runtime {
     type EpochDuration = EpochDuration;
     type ExpectedBlockTime = ExpectedBlockTime;
     type EpochChangeTrigger = pallet_babe::ExternalTrigger;
-    type KeyOwnerProof = <Historical as KeyOwnerProofSystem<(KeyTypeId, BabeId)>>::Proof;
+    type KeyOwnerProof = sp_session::MembershipProof;
     type EquivocationReportSystem =
         pallet_babe::EquivocationReportSystem<Self, Offences, Historical, ReportLongevity>;
     type WeightInfo = ();