Update coins combine function to accept a -y flag to bypass the confirmation prompt

[BrandtH22]

The coins combine function currently requires a confirmation (y) is entered to complete the combination. This design makes it very difficult to add the coins combine function to a script for users who need to combine lots of coins together.

Is it possible to update the coins combine function to include an optional flag that bypasses the confirmation here?
https://github.com/Chia-Network/chia-blockchain/blob/main/chia/cmds/coin_funcs.py#L172