Improve terraform templates generator with build configs

[eistrati]

Describe the Feature

Improve terraform templates generator with build configs

Expected Behavior

1. Extract additional config NOT related to terraform template from .terrahub.yml.twig for components like s3_bucket and lambda_function
2. Store these configs in ./lib/configs/aws/[component_name].yml
3. Update generator script to include additional config for specific components (regardless if it's aws, google, azurerm or others)
4. Move component specific scripts folder from ./src/templates/aws/[template_name]/scripts/ to ./lib/scripts/aws/[template_name]/ (e.g. lambda_function, s3_bucket, cloudfront_distribution)

[eistrati]

One more idea:
Update publish.js to run generator script every time when new release candidate (PR into stage branch) is created.