feat: merge variables from required input packages into composable manifests#1

teresaromero wants to merge 4 commits into3278-bundle-templates-required-input-packagesteresaromero/elastic-package:3278-bundle-templates-required-input-packagesfrom

3279-merge-variables-when-required-inputteresaromero/elastic-package:3279-merge-variables-when-required-inputCopy head branch name to clipboard