Make sure file permissions are set correctly in docker

### Is your feature request related to a problem?

After the validation workflow is completed the validator container will collect metrics from prometheus container, we create metrics file from the container in `/opt/data/metrics` which is in turn mounted in disk.

After the pipeline of CD is completed we want to clean dumped files from the user disk however the permission on metrics file aren't set correctly because we are using root user in all our containers.

### Describe the solution you'd like

one possible solution is to set a non root user by adding 2 arguments to dockerfile USER_ID and USERGROUP_ID which are extracted from the current user terminal session.

in docker file for a user named archethic_node and a group named archethic

`ARG USER_ID
ARG GROUP_ID
RUN addgroup -g $GROUP_ID archethic && \
adduser --shell /sbin/nologin --disabled-password \
--uid $USER_ID --ingroup archethic archethic_node`

and then

`USER archethic_node`

when building image
`{user_id, _} = System.cmd("id", ["-u"])`

`{group_id, _} = System.cmd("id", ["-g"])`

` {_, 0} =
docker([
"build",
"-t",
"archethic-ci",
"--target",
"archethic-ci",
"--build-arg",
"USER_ID=#{String.trim(user_id)}",
"--build-arg",
"GROUP_ID=#{String.trim(group_id)}",
"."
])`

however when changing user we have a git dubious ownership error when trying to create a new branch for code proposal.

### Additional context

Epic: #154