Migrate vesting account transfer tests to use x/accounts lockup accounts in v0.52

[damiannolan]

Summary

Vesting accounts testcases were recently added to ibc transfer module. The tests need to be migrated to use x/accounts lockup instead, as x/vesting has been removed in v0.52.

See cosmos-sdk UPGRADING.md for details.

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[gjermundgaraba]

@damiannolan is this something that need to happen as part of the 0.52 upgrade or can it be done prior to that?

[damiannolan]

It can be on the #7223 PR/branch or done separately once that lands on main