Apply seeds in cli-migrations v3

### Is your proposal related to a problem?

The CLI Migrations docker image currently only applies the migrations and the metadata, the proposal is for it to also apply the `seeds` when the directory is present

### Describe the solution you'd like

- If the `hasura-seeds` directory is mounted to the container, apply the seeds

### If the feature is approved, would you be willing to submit a PR?

Yes, already on it

Start by locating the CLI Migrations v3 container entrypoint and the existing logic that applies migrations and metadata. Trace how a mounted hasura-seeds directory is detected; done means seeds are applied when that directory is present without changing behavior when it is absent.

Written by the indexing model from the issue text.