tracers: rework chain trace

[yoomee1313]

Proposed changes

• This PR is brought from ethereum to fix the oom issue when calling debug api repeatedly. (e.g. once every 10 seconds)

Types of changes

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• Bugfix
• New feature or enhancement
• Others

Checklist

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• I have read the CONTRIBUTING GUIDELINES doc
• I have read the CLA and signed by comment I have read the CLA Document and I hereby sign the CLA in first time contribute
• Lint and unit tests pass locally with my changes ($ make test)
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Related issues

• en memory increase #75

Further comments

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