feat(infra): Expose abstract Shard class [CLK-187171]#3

Justinon merged 3 commits intomaintime-loop/cdk-named-environments:mainfrom

Justin-Glommen/CLK-187171/Open-Source-NamedEnvs-for-CDKtime-loop/cdk-named-environments:Justin-Glommen/CLK-187171/Open-Source-NamedEnvs-for-CDKCopy head branch name to clipboard