World state halt and chain halt fixes

[jframe]

PR description

Further improvements to fix the world state halts and some cases of the chain halt.

• Added pivot block checks back into the snap sync pipeline to prevent world state halting due to not having the current pivot block. The World State pipeline could halt due to a chain halt since it depended on block added events to check for new pivot blocks.
• Made the pivot block check in the snap worldstate pipeline async and this was called on the block added event from the chain download pipeline and blocked the import thread
• Added time to the pivot block selector and decreased the timeout in the DynamicPivtoBlockSelector from 5 minutes to 20 seconds
• Disconnect peers when we only receive a partial response for block headers after multiple tries. Some nodes were only sending a response of a single header instead so we would get stuck in the chain download.

Fixed Issue(s)

fixed #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

[pinges]

LGTM