fix(eth/gasestimator): cap osaka estimate hi at maxtxgas, #32348

[gzliudan]

Proposed changes

Cap Estimate gas upper bound to params.MaxTxGas when Osaka rules apply, so the initial execution path cannot start above the EIP-7825 transaction gas cap.

Add TestEstimateCapsHiAtMaxTxGasOnOsaka to lock this behavior and prevent regressions where estimation would fail with transaction gas limit too high.

Ref: ethereum#32348

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• This PR has sufficient test coverage (unit/integration test) OR I have provided reason in the PR description for not having test coverage
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[Copilot]

Pull request overview

Updates the gas estimation logic to better align with Osaka (EIP-7825) per-tx gas caps, and adjusts related test scaffolding in the override package.

Changes:

• Cap the gas estimator’s upper bound (hi) to params.MaxTxGas when estimating for Osaka.
• Add handling for core.ErrGasLimitTooHigh inside the gas estimation execution helper.
• Update a precompile test stub in override_test.go.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
internal/ethapi/override/override_test.go	Adds a Name() method to the precompile test double.
eth/gasestimator/gasestimator.go	Caps estimator upper bound for Osaka and adds an ErrGasLimitTooHigh special-case in execute.

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