Remove interim dir that is used to create standalone/lab-interactive.tar.gz

[#71262316]
Delete 'i18nMetadata' property in standalone interactive

[#71262316]

I don't think it makes sense to support language switching there,
it would add lots of complexity.

User can create standalone interactive in any language he wants, by
providing the right Interactive path.
Call popluate-standalone.sh during S3 deploy, do not download lab archive twice

[#71262316]