Implement tests for AccountInfo validation chain functions

[Jac0xb]

PR

I have something very similar in lighthouse figured I could rewrite tests.

• Implement unit tests for AccountInfo validation chain functions.

• Removed redundant reference in has_address.

Thoughts

• Validation errors could be more specific
• Need a few more. Let me think on this one.

[Jac0xb]

noticed that the macro adds discrim field so need to change that