Allow transactions to fail

[timbrinded]

Right now the viem is very over eager with running estimateGas() which means you cannot ever submit a failing transaction to the block chain.

Even when using wallet.signTransaction() to generate a raw serialized txn string, you still will receive errors due to the calls of eth_estimateGas() (even when all gas params have been supplied).

Please can we have a toggle to relax this behaviour? For test scenarios it is really important to be able to model the negative cases.