Refactor pallet-state-trie-migration to fungible::* traits (#1801)

## Summary

This PR consolidates `pallet-state-trie-migration` as a part of
https://github.com/paritytech/polkadot-sdk/issues/226 /
https://github.com/paritytech/polkadot-sdk/issues/171:

`pallet-state-trie-migration`:
- [x] replace `Currency` with `fungible` traits
- [x] run benchmarks
- [x] refactor to `DefaultConfig`

`pallet_nicks`:
- [x]  remove

others:
- [x] remove `as Fn*` or `asFun*` stuff based on discussion
[here](https://github.com/paritytech/polkadot-sdk/issues/226#issuecomment-1822861445)

---------

Co-authored-by: Richard Melkonian <35300528+0xmovses@users.noreply.github.com>
Co-authored-by: command-bot <>

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

@@ -533,7 +533,7 @@ impl pallet_balances::Config for Runtime {
 	type WeightInfo = pallet_balances::weights::SubstrateWeight<Runtime>;
 	type FreezeIdentifier = RuntimeFreezeReason;
 	type MaxFreezes = ConstU32<1>;
-	type MaxHolds = ConstU32<6>;
+	type MaxHolds = ConstU32<7>;
 }
 
 parameter_types! {
@@ -1901,6 +1901,7 @@ impl pallet_state_trie_migration::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	type ControlOrigin = EnsureRoot<AccountId>;
 	type Currency = Balances;
+	type RuntimeHoldReason = RuntimeHoldReason;
 	type MaxKeyLen = MigrationMaxKeyLen;
 	type SignedDepositPerItem = MigrationSignedDepositPerItem;
 	type SignedDepositBase = MigrationSignedDepositBase;