Docker commands in Eth2fuzz Makefile to flexibly handle interactive terminals

[gnattishness]

Is your feature request related to a problem? Please describe.

When running eth2fuzz in an interactive terminal, I can't use Ctrl-C to stop the container.

I currently need to use docker stop $CONTAINER_ID to stop fuzzing.

Describe the solution you'd like

Makefile to detect if it's in an interactive terminal, and pass appropriate -it to docker

Alternatively have a Makefile variable that can be set to enable/disable interactive docker run

Additional context

The interactive -it was previously removed, to allow people to more easily run eth2fuzz in remote terminals with nohup to protect against disconnections.