Wait for checkpoint service to stop during reconfig

[bingyanglin]

Description of change

This is the pre-required PR for issue #4692
Apply the bug fixing from [Checkpoint] wait for checkpoint service to stop during reconfig #17556:

Currently during reconfig, CheckpointService tasks, including CheckpointBuilder and CheckpointAggregator, are notified to shut down. But reconfig does not wait for them to finish shutting down. There can be a race between the reconfig loop proceeding to drop the epoch db handle, while CheckpointBuilder tries to read from epoch db when creating a new checkpoint. The race can result in panics.

Links to any relevant issues

fixes #5411

Type of change

• Bug fix (a non-breaking change which fixes an issue)

How the change has been tested

Ran the local network with RUST_LOG=info cargo run --release --bin iota start --force-regenesis --with-faucet

Change checklist

Tick the boxes that are relevant to your changes, and delete any items that are not.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked that new and existing unit tests pass locally with my changes

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4 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
apps-backend	⬜️ Ignored (Inspect)			Feb 17, 2025 7:16am
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rebased-explorer	⬜️ Ignored (Inspect)			Feb 17, 2025 7:16am
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[bingyanglin]

Duplicate of #5391