Ersilia pack dockerization

[DhanshreeA]

This PR achieves a few things:

1. Renaming sub-directories within the dockerfiles directory with more descriptive naming to indicate the evolution of Ersilia's Docker build approaches, namely, legacy-bentoml (v1), multistage-condapack (v2), and the latest approach - ersiliapack.
2. Corresponding to this renaming, v1 and v2 have been replaced respectively with their descriptive names in ersilia-base-image-to-dockerhub.yml workflow, and place_a_dockerfile_in_current_eos_repo.py script.
3. Template dockerfiles for ersilia pack dockerization have been introduced with relevant local build instructions.

[miquelduranfrigola]

Any feedback you need from me, @DhanshreeA ?

[DhanshreeA]

Any feedback you need from me, @DhanshreeA ?

Thanks @miquelduranfrigola , all good.