49f9b645ea refactor: Testnet4 - Replace uint256S("str") -> uint256{"str"} (Hodlinator)
Pull request description:
Ran scripted-diff from 2d9d752e4f:
```
sed -i --regexp-extended -e 's/\buint256S\("(0x)?([^"]{64})"\)/uint256{"\2"}/g' $(git grep -l uint256S)
```
Follow-up to Testnet4 introduction #29775 which overlapped with work on `uint256` `consteval` ctor #30560 (the latter includes the scripted-diff commit).
Going forward `uint256{}` should be used for constants instead of `uint256S()`.
ACKs for top commit:
maflcko:
review-ACK 49f9b645ea🐮
fjahr:
ACK 49f9b645ea
Tree-SHA512: 94fe5d9f1fb85e9ce5c3c4c5e4c31667e8cbb55ee691a4b5b3ae4172ccac38230281071023663965917f188b4c19bdf67afd4e3cdf69d89e97c65faea88af833
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