Cannot set raise_error to False when injecting signal via network

For the individual interferometers, there is now a handy check to make sure that the template duration fits the segment that is performed when the signal is injected. This can be disabled by passing raise_error=False to the interferometer-level call to inject_signal. However, the same is now true for the network-level call to inject_signal, so this error cannot be disabled when injecting via the network.