EVM: propagate syscall error from send

[Stebalien]

send_generalized now returnes the syscall error directly. We need to bubble this through the EVM and:

1. Use it in the call_actor precompile.
2. Consider using it in other cases as well (e.g., actor construction).

[maciejwitowski]

@Stebalien is half-step from your PR enough for C.2 or do we need this issue resolved?

[arajasek]

Defer to @Stebalien but I think this can be a C.3 thing.

[maciejwitowski]

@mriise is this something you can handle this week? Or would @vyzo be a better person? We really need to triage a few more issues and get done this week.
cc @Stebalien