Move deferred transaction into deferred_transaction.hpp

[heifner]

Change Description

transaction.hpp declared send_deferred and cancel_deferred which bloat all contracts that include transaction.hpp since these can no longer be used on Vaulta. Move the transaction send() capability for deferred transactions into deferred_transaction so it is available for tests, but does not bloat every contract that includes transaction.hpp.

For example, every contract that includes transaction.hpp currently has:

(import "env" "send_deferred" (func (;12;) (type 8)))

API Changes

• API Changes

Documentation Additions

• Documentation Additions