`ScriptTransaction` and `CreateTransaction` expose `fuel_tx::Input`

[segfault-magnet]

and fuel_tx::Input is not useable through fuels. We should either change tx.inputs() so it returns the fuels Input type or reexpose fuel_tx::Input (that will cause confusion as to which one should be imported).

When the change is made make sure to remove the fuel-tx dep from the e2e tests.