[admin-tool] Add a cluster batch processing framework command and a system store empty push task

[sixpluszero]

[admin-tool] Add a cluster batch processing framework command and a system store empty push task

This is just a side-effect PR I created for batch processing all stores in cluster when I am empty pushing all system stores to apply config updates.
Add the new command so you can write your store-oriented task and execute it cluster-wide with the admin-tool. It supports basic checkpointing and parallel processing.
With this, there is a system store empty push task in this PR as well, it did sanity checks and empty push to all system stores for a specific user store.
I think it can be further optimized and used for other purpose, but I found it efficient to empty push system store to apply ZK-shared store config update.

How was this PR tested?

This tool has been directly used in test environment and production environment.

Does this PR introduce any user-facing changes?

• No. You can skip the rest of this section.
• Yes. Make sure to explain your proposed changes and call out the behavior change.