✨ Frontend: 2FA improvements

[odeimaiz]

What do these changes do?

• Expose twoFAPreference setting only when webserverLogin.LOGIN_2FA_REQUIRED is set to True
• Show warning message when the user want to disable the 2FA
• Reduce resend-code via different method to 20"
• Support user's code-via-email preference when logging in
• Stop using deprecated fields

1a. First Log in and skip phone registration

1b. First Log in and register phone

2a. Log In with Preferred method: SMS default

2b. Log In with Preferred method: Email

2c. Log In with Preferred method: Disabled

3 Alternative to the Preferred method

Related issue/s

Frontend for ITISFoundation#5668

How to test

Dev-ops checklist

• No ENV changes or I properly updated ENV (read the instruction)