[RPC] The return value of function EthBlockFromTendermint lacks the logical processing of miner & receiptsRoot

[banishee]

System info: [Include Ethermint commit, operating system name, and other relevant details]

• branch dev

Steps to reproduce:

1. The value miner & receiptsRoot processed from function EthBlockFromTendermint are default value https://github.com/cosmos/ethermint/blob/fae8147352e65b86f0755a081f3b59b1e25d48bf/rpc/types/utils.go#L172 https://github.com/cosmos/ethermint/blob/fae8147352e65b86f0755a081f3b59b1e25d48bf/rpc/types/utils.go#L183

Expected behavior: [What you expected to happen]

• Developer should get a block proposal validator of a certain height, based on miner
• Developer should verify the authenticity of transaction receipts, based on receiptsRoot

Actual behavior: [What actually happened]

• For now, we cannot get any information about these two values.

Additional info: [Include gist of relevant config, logs, etc.]

• Linked to #813

[github-actions[bot]]

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