Modernize the Address class (and all the Addresses)

This is related to #1231, so the two could be tackled together.

The Address class stores the address bytes in:

    uint8_t m_data[MAX_SIZE]; //!< The address value

This should be converted in

    std::array<uint8_t, MAX_SIZE> m_data; //!< The address value

The benefits are obvious:

1. The default comparison operators will work, as two arrays can be compared lexicographically.
2. Copy operators can be removed, as the default ones will do the right thing.
3. Initializing an array to 0 is simpler.
4. Copying 2 arrays of different length is a 1-line instruction (caveats apply)
5. etcetera

A good MR should:

• Modify the data type
• Remove the redundant functions
• Add some functions (if needed), like initializing the address from an array

Additionally, one could explore if some functions could be deprecated, like the initialization from "C-style" arrays.

Removing the custom comparison operators (i.e., fixing #1231 for the addresses) is a bonus, but it should come naturally.