Terminating tracee-rules on EOF of all files

[AsafEitani]

When ran with the --input-tracee file:/path/to/file flag tracee-rules keeps running forever after finishing processing the file.
I think adding a feature, that once every file has been processed, tracee-rules should terminate.
This could allow automation for logs originated from tracee-ebpf.

Of course this feature will not be implemented for --input-tracee file:stdin flags, as there is not EOF (only termination signals).

[itaysk]

this should be the current behavior IIRC

[AsafEitani]

#874