Add Missing Events for Balances Pallet

[muharem]

There are cases in the Balances pallet where events are missing, which might impact systems relying on balance updates for accounting. The known cases include:

1. fungible trait impl for Hold/Release operations:
   No events are emitted when a balance is placed on hold or released.
2. Burn/Mint Events for Credit/Debt drops
   When Credit or Debt fungible types are dropped, the total issuance is adjusted, but no Burn or Mint events are published.

Please verify these cases and check if any other major events are missing in the Balances pallet.