Generate hashes of different library versions and validate them

[sonicaj]

This PR adds changes to generate sha256sum hashes of base lib versions to ensure their consistency.

Hashes can be generated by running it in the following manner

apps_catalog_hash_generate --path /repo

This will generate library/hashes.yaml and also go over all apps in ix-dev and if they have a lib_version specified in app.yaml we will copy over the lib version library/version to ix-dev/train/app/templates/library/base_vversion as well and update app.yaml to add lib_version_hash.