PR description

Added the method Wei getBlobGasPrice(BlockHeader blockHeader); to the BlockchainService so that plugins can get the blob gas price by block header.

Fixed Issue(s)

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

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• reference tests: ./gradlew ethereum:referenceTests:referenceTests