fix: adding new fields to destination accounts

[ndasari2]

Summary of Changes

Adding new fields in the destination endpoint to support cross account transfer calls

SPECS changes MR
https://gitlab.com/mxtechnologies/mx/gutenberg/-/merge_requests/901

Fixes # (issue)

Public API Additions/Changes

Adding new fields in the destination endpoint to support cross account transfer calls payload

Downstream Consumer Impact

This should not impact any existing code bases or client as this is backward compatiable

How Has This Been Tested?

Nothing to test much here as this is just adding a new field in the destination payload

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works

[meotch]

Should account_type_subtype be account_subtype instead? type_subtype is redundant

[kcpotluri]

Should account_type_subtype be account_subtype instead? type_subtype is redundant

No this is similar to account_type_ number but rather than number we added a new fields to be used as string. So Joe suggested to keep it account_type_subtype for easy differentiation