Update Random to Hash of Block Timestamp

[Kbhat1]

Describe your changes and provide context

• Replace Random field with hash of block timestamp

Testing performed to validate your change

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 60.58%. Comparing base (3b8b27c) to head (296fad4).

Additional details and impacted files

[](https://app.codecov.io/gh/sei-protocol/sei-chain/pull/1740?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sei-protocol) ```diff @@ Coverage Diff @@ ## main #1740 +/- ## ========================================== - Coverage 60.64% 60.58% -0.07% ========================================== Files 372 372 Lines 27022 27022 ========================================== - Hits 16388 16370 -18 - Misses 9536 9552 +16 - Partials 1098 1100 +2 ``` | [Files](https://app.codecov.io/gh/sei-protocol/sei-chain/pull/1740?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sei-protocol) | Coverage Δ | | |---|---|---| | [x/evm/keeper/keeper.go](https://app.codecov.io/gh/sei-protocol/sei-chain/pull/1740?src=pr&el=tree&filepath=x%2Fevm%2Fkeeper%2Fkeeper.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sei-protocol#diff-eC9ldm0va2VlcGVyL2tlZXBlci5nbw==) | `49.46% <100.00%> (ø)` | | ... and [3 files with indirect coverage changes](https://app.codecov.io/gh/sei-protocol/sei-chain/pull/1740/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=sei-protocol)