Added minio migration script

[sougata-progress]

story : CHEF-16458

[mwrock]

I don't see where the migration is happening in this PR. It looks like it checks if the latest core/minio is installed and if not it installs it. What it needs to do is check if the core/minio is <= 2023-11-01T01-57-10Z. If core/minio is not installed of if the version is > 2023-11-01T01-57-10Z then do nothing and let the provision.sh script do its thing. If they are <= 2023-11-01T01-57-10Z then their minio data needs to be migrated (see https://github.com/habitat-sh/on-prem-builder/blob/main/scripts/minio-update.sh).

You will want to test this by having a stable stand alone builder server setup with some installed packages. Then follow https://github.com/habitat-sh/on-prem-builder/blob/main/on-prem-docs/upgrading.md to do an upgrade. After the upgrade you should be on the LTS minio and all your packages and package metadata should still be visible in the builder UI and you should be able to download them with the hab binary too.

Note that before doing the update, you should set BLDR_CHANNEL to unstable in the bldr.env file to get the latest builder packages.

[mwrock]

Another thing in addition to the comments, what if any of these is not installed: 'core/aws-cli' 'core/bc' 'core/coreutils'? I think we need to make sure they are installed and install if not present. At least aws-cli. Need to check if we need the others.