PrivKeyPolicy type must not implement Clone or Derive

[Alrighttt]

komodo-defi-framework/mm2src/coins/lp_coins.rs

Line 3869 in 4e8bc50

#[derive(Clone, Debug)]

We should remove Clone and Debug implementations for this type since it handles private keys. There seems to be no instance of using Debug. There are two instances of using Clone which must be refactored:

komodo-defi-framework/mm2src/coins/eth/v2_activation.rs

Line 424 in 4e8bc50

priv_key_policy: self.priv_key_policy.clone(),

komodo-defi-framework/mm2src/coins/eth/v2_activation.rs

Line 515 in 4e8bc50

priv_key_policy: self.priv_key_policy.clone(),

[Alrighttt]

We should consider if it makes sense to also remove pub from this type.

[Alrighttt]

This is a more significant refactor than first stated due to the common pattern of cloning the "Coin" structs such as UtxoStandardCoin, EthCoin, ZCoin, etc.