bal-devnet-3: Update EIP-8024: switch to new decoding algo

[daniellehrner]

PR description

EIP-8024 decoding changed to the new spec: ethereum/EIPs#11306

Fixed Issue(s)

fixes #9827

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

• spotless: ./gradlew spotlessApply
• unit tests: ./gradlew build
• acceptance tests: ./gradlew acceptanceTest
• integration tests: ./gradlew integrationTest
• reference tests: ./gradlew ethereum:referenceTests:referenceTests
• hive tests: Engine or other RPCs modified?

[Copilot]

Pull request overview

Updates Besu’s EIP-8024 immediate decoding to match the revised spec (new branchless decoding), and adjusts unit/acceptance tests plus devnet fixtures accordingly.

Changes:

• Updated EIP-8024 decoder tables to use the new branchless formulas for decode_single and decode_pair.
• Updated DUPN/SWAPN/EXCHANGE unit tests to reflect new immediate→operand mappings and end-of-code behavior.
• Updated acceptance-test dev fixtures and test documentation to use the new immediates used by the updated spec vectors.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
evm/src/main/java/org/hyperledger/besu/evm/operation/Eip8024Decoder.java	Implements the new EIP-8024 decoding formulas and updates validity ranges.
evm/src/test/java/org/hyperledger/besu/evm/operation/SwapNOperationTest.java	Updates SWAPN decoding/behavior expectations to match the new mapping.
evm/src/test/java/org/hyperledger/besu/evm/operation/DupNOperationTest.java	Updates DUPN decoding/behavior expectations to match the new mapping.
evm/src/test/java/org/hyperledger/besu/evm/operation/ExchangeOperationTest.java	Updates EXCHANGE decoding/behavior expectations and spec vectors for the new mapping.
acceptance-tests/tests/src/acceptanceTest/resources/dev/dev_amsterdam.json	Updates embedded EIP-8024 test bytecode/decompilation strings to the new immediates.
acceptance-tests/tests/src/acceptanceTest/java/org/hyperledger/besu/tests/acceptance/ethereum/EIP8024StackOpcodeAcceptanceTest.java	Updates explanatory comments for acceptance tests to match new spec/immediates.

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