feat: Shared storage variable from extra conf

[ddubuc]

Describe the solution you'd like
We should be able to set the mounted path in the worker to manage the path in the container. Almost all code was here. It's missing a setting in the mount_path volume to get the target_path from Kubernetes_secrets as others value come from.
[var_shared_storage_target_path.patch]

Describe alternatives you've considered
Please find in attachment the patch to review as feature to evaluate from ArmoniK Team :
(https://github.com/aneoconsulting/ArmoniK.Infra/files/12677229/var_shared_storage_target_path.patch)

Additional context
This change is only available on locahost at the moment