feat(console-wallet): adds basic grpc authentication

[sdbondi]

Description

• adds basic password auth interceptor to wallet grpc.
• disables grpc by default
• adds hash-grpc-password command that produces a salted hashed password that clients can use for authentication
• adds cli args to explicitly enable grpc
• adds wallet.grpc_authentication configuration
• allow grpc client to use basic auth if configured
• add --enable-grpc cli flag to wallet

Motivation and Context

Fixes #4478
Secure GRPC calls with basic auth.
User should explicitly enable grpc when it is needed.

Usage:

• Set grpc_authentication = { username: "foo", password: "bar" }
• Call tari_console_wallet hash-grpc-password and copy the hash
• Use the username and hashed password in e.g. postman or any other grpc client

How Has This Been Tested?

Basic unit tests
Manually (POSTman and running a miner with GRPC auth enabled)