[TON]: Fixes issue with large transfers #4413
                
     Merged
            
            
          
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Description
Fixes #4151
Breaking Change
This PR changes the amount type in TON API to accept big-endian bytes instead of uint64 to support large amount transfers.
How to test
Run tests across platforms
Types of changes
Bug fix (breaking change which fixes an issue)
Checklist
If you're adding a new blockchain