rusk-wallet: Rename --profile to --wallet

[HDauven]

Summary

We currently use a wallet -> profile -> account(shielded, public) hierarchy. The --profile flag is used in a different way. The profile is in essence a new folder in which a wallet is maintained.

Possible solution design or implementation

We should rename --profile to --wallet. This is a breaking change and the flag is actively used in multiple locations. We need to be sure the flag is updated properly everywhere, like some of our tools and the faucet.