env value leak to migration though prefix

[ivan-kardash]

I have set the plugin:

"@payloadcms/storage-s3": "3.0.0-beta.87",

with the configuration:

export const s3StorageConfig: S3StorageOptions = {
  collections: {
    media: {
      prefix: `${process.env.S3_PREFIX}`,
    },
  },
  ...
}

Finally, I've created a migration by payload CLI yarn payload migrate:create test, and noticed that the migration that was created has the value from my .env file.
For instance:
If my .env includes S3_PREFIX=bar, created migration will includes raw

"prefix" varchar DEFAULT 'bar',

It happens because s3-storage creates a field with the name 'prefix' and defautltValue 'bar'.

For my usage of payload, I have got a few environments that can have different prefixes, and I would like to have stable migrations for different stages