[NT-453] [Investment Day] - Fix ViewModels protocols conformance

[Scollaco]

📲 What

• Makes viewModels explicitly conform to their respective protocols.

🤔 Why

• As pointed by @dusi , by doing that we avoid classes to access viewModels properties directly, making the access possible strictly by inputs.

🛠 How

• Searched for viewModels failing to follow that pattern and replaces let viewModel = ViewModel() with let viewModel: ViewModelType = ViewModel().

✅ Acceptance criteria

• No difference should be notices throughout the app.

[dusi]

🚢 🚢 🚢
🚢 🚢 🚢
🚢 🚢 🚢