Added test for multiple send

[nerfZael]

I think with this final test, we could say that we have the send feature covered and if tests pass 100% we can close the send part of: #166

[nerfZael]

/workflows/benchmarks agents/token/send 10

[github-actions]

Finished benchmarks

Test Run Summary

• Run from: ./autotx/tests/agents/token/send
• Iterations: 10
• Total Success Rate: 100.00%

Detailed Results

Test Name	Success Rate	Passes	Fails	Avg Time
autotx/tests/agents/token/send/test_send.py::test_auto_tx_send_eth	100%	10	0	16s
autotx/tests/agents/token/send/test_send.py::test_auto_tx_send_eth_multiple	100%	10	0	35s
autotx/tests/agents/token/send/test_send.py::test_auto_tx_send_eth_sequential	100%	10	0	23s
autotx/tests/agents/token/send/test_send.py::test_auto_tx_send_erc20_parallel	100%	10	0	23s
autotx/tests/agents/token/send/test_send.py::test_auto_tx_send_erc20	100%	10	0	18s

Total run time: 19.01 minutes