cmd/puppeth: fix node deploys for updated dockerfile user

Change handling of dirty objects in state

Most of these methods did not contain all the relevant information
inside the object and were not using a similar formatting type.
Moreover, the existence of a suboptimal String method breaks usage
with more advanced data dumping tools like go-spew.

This is supposed to fix the FTP upload issue according to
travis-ci/travis-ci#9391.

- Uniform code style.

- Fixes #16271. What was appeneded was a pointer to
an object that changes during the iteration.
- The topic is allocated as a 4-byte array, fill partial topics
with 0s. Partial topics are currently disabled, but would
crash as they rely on the presence of byte number 3.

core/vm: Fixed typos in core/vm/interpreter.go

core/vm: Fixed typos

* cmd/puppeth: add constraints to network name

* cmd/puppeth: update usage of network arg

* cmd/puppeth: avoid package dependency on utils

cmd: implement preimage dump and import cmds