Implement IAM permissions required to use ECR Private Registry as pull through cache#1560

mcncl merged 1 commit intomainbuildkite/elastic-ci-stack-for-aws:mainfrom

SUP-4591-ecr-pull-through-cache-permissionsbuildkite/elastic-ci-stack-for-aws:SUP-4591-ecr-pull-through-cache-permissionsCopy head branch name to clipboard