agreements and requiredField ClientErrors are only there because of tracking pod

[aliak00]

The two client errors:

1. ClientErrors.agreements
   

   account-sdk-ios/Source/UI/Screens/Terms/TermsViewController.swift

   Line 154 in f3b3837

   self.configuration.tracker?.error(.validation(.agreements), in: self.trackerScreenID)

2. ClientError.requiredField
   

   account-sdk-ios/Source/UI/Screens/RequiredFields/RequiredFieldsViewController.swift

   Line 330 in f3b3837

   self.configuration.tracker?.error(.validation(.requiredField(errorMessages)), in: self.trackerScreenID)

Are only there for tracking purposes and should not be exposed to the client as a "handleable" error.

Possible solution:

• The tracker .validation error currently takes a ClientError so one possible fix would be to have a .validation(clientError: ClientError) and .validation(string: String) and just use a hardcoded tracker specific string with agreements missing.

On required field:

• This may not need to be squashed because spid does return required field errors and we do not handle those. See Handle required field errors from spid #201