Fix Worldstate halt

[jframe]

PR description

PR created on behalf of @matkt https://github.com/matkt/besu/tree/feature/try-fix-ws-halt branch.

It fixes a possible halting of the worldstate download during the initial sync.

• Modified worldstate sync pipeline so it is notified when importing a new block. Before the pipeline got stuck in some cases
• Added a timeout of 10s on tasks
• Removed useless requests from retries. Old requests were accumulating before

Testing

• Checkpoint sync on mainnet with 15 nodes. None had a worldstate halt with the PR. Before ~20% of nodes failed with ws halt.

Fixed Issue(s)

Fixes #6908

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• Considered documentation and added the doc-change-required label to this PR if updates are required.
• Considered the changelog and included an update if required.
• For database changes (e.g. KeyValueSegmentIdentifier) considered compatibility and performed forwards and backwards compatibility tests

Locally, you can run these tests to catch failures early:

• unit tests: ./gradlew build
• acceptance tests: ./gradlew acceptanceTest
• integration tests: ./gradlew integrationTest
• reference tests: ./gradlew ethereum:referenceTests:referenceTests