[NT-736] Debug tools deviceIdentifier and appVersion

[Scollaco]

📲 What

• Adds device's identifierForVendor and appVersion to the footer of BetaToolsViewController.

🤔 Why

From the JIRA ticket:

In order to whitelist our own devices for testing, we'll need to know our own deviceIdentifiers. Displaying the deviceIdentifier on the debug menu will make it easier to test whitelisting our devices into various experimental variants.

Additionally, displaying the App Version on the debug tools menu means that you no longer need to be logged in to see what app version you're on during testing.

🛠 How

• Extracted the existing footerView to a separated class.
• Added 2 extra stackViews containing the identifier and app version (The values come from AppEnvironment)
• To keep the betaFeedback button working, a BetaToolsFooterViewDelegate was created.
• New snapshots

👀 See

Before 🐛	After 🦋

✅ Acceptance criteria

• Open the debug tools menu. The deviceIdentifier and appVersion info should be visible below the beta feedback button
• The Submit Feedback For Beta button should work normally.

[ifbarrera]

👏 yay!