bug: txrelayer-fails-with-anvil

[uri-lightblocks]

Description

Fix the txrelayer to work with anvil

• Use DefaultGasLimit if EstimateGas fails. There is open issue in anvil on creating smart contract
• Fix the call to FeeHistory, passing empty slice instead of nil

Changes include

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)

Breaking changes

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Checklist

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Documentation update

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[uri-lightblocks]

The link to the CLA Document is broken

[Stefan-Ethernal]

I'm afraid that there would be the cases, where even twice the DefaultGasLimit would not help, because it is probably related to SC logic or other transaction parameters, so even if we set gasLimit to some (reasonable) high value, the transaction would still fail afterwards. So IMO I'd prefer to revert the old behavior.