build: LTO profile 'thin' and moved to Cargo.toml

It makes more sense to set the release LTO profile into the related Cargo.toml section than into the Dockerfile only.

Using LTO 'thin' profile because according to the documentation it is a good compromise with no or little performance loss.

pallets/duniter-wot/src/mock.rs

@@ -146,10 +146,12 @@ impl pallet_membership::Config<Instance1> for Test {
     type CheckCallAllowed = DuniterWot;
     type IdtyId = IdtyIndex;
     type IdtyIdOf = IdentityIndexOf<Self>;
+    type AccountIdOf = ();
     type MembershipPeriod = MembershipPeriod;
     type MetaData = ();
     type OnEvent = DuniterWot;
     type RuntimeEvent = RuntimeEvent;
+    type WeightInfo = ();
     type PendingMembershipPeriod = PendingMembershipPeriod;
 }
 
@@ -199,10 +201,12 @@ impl pallet_membership::Config<Instance2> for Test {
     type CheckCallAllowed = SmithSubWot;
     type IdtyId = IdtyIndex;
     type IdtyIdOf = IdentityIndexOf<Self>;
+    type AccountIdOf = ();
     type MembershipPeriod = SmithMembershipPeriod;
     type MetaData = ();
     type OnEvent = SmithSubWot;
     type PendingMembershipPeriod = SmithPendingMembershipPeriod;
+    type WeightInfo = ();
     type RuntimeEvent = RuntimeEvent;
 }