Millisecond Blocktimes

[fahimahmedx]

Todo

• Implement a pseudo "millisecond" blocktime by taking seconds and scaling them up into milliseconds, and pass tests.
• Update ExecutionPayload to have Milliseconds field, as implemented in my op-geth
• Modify all usages of L2BlockRef.Time to use ExecutionPayload.Milliseconds
• Modify all usages of functions like cfg.isEcotone() to take in ExecutionPayload.Milliseconds instead of ExecutionPayload.Seconds
• Update PayloadAttributes to have Milliseconds field
• Update the checks in AttributesMatchBlock() to check based on the Millisecond fields of ExecutionPayload and PayloadAttributes
• Update SpanBatch to use Milliseconds
• Update SingularBatch to use Milliseconds
• Update MarshalSSZ() and UnmarshalSSZ() in op-service/eth/ssz.go to include Milliseconds, and include test cases in ssz_test.go
• Modify PayloadInfo.Timestamp to use timeint.Milliseconds` datatype
• Investigate how computePayloadId() in l2_engine_api.go needs to be modified to support Milliseconds field in PayloadInfo.

[github-actions]

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