update balances module

[failfmi]

The balances module is outdated compared to Substrate.

Revisit the logic, check for newly added functionality, make fixes and refactor.

• Genesis builder
• Extrinsic calls
  • transfer is fully replaced by transfer_allow_death
  • setBalance is force_set_balance
  • forceFree is force_unreserve
  • recently added extrinsic calls:
    • - upgrade_accounts
    • - force_adjust_total_issuance

Apply the following:

• Implementation
  • Extrinsic calls
  • Metadata
• Inline documentation
• Unit tests
• Integration tests
• Benchmark tests and weights for the extrinsic calls.