Feature/safer stack usage bn254

[garyschulte]

second round greptile bot

[greptile-apps]

PR Summary

This pull request enhances the safety and correctness of EIP-196 operations for the BN254 curve in the besu-native repository. Key changes include:

• Implemented subgroup checks instead of curve checks for G1 and G2 points in gnark-eip-196.go
• Updated error handling to provide more specific error messages for invalid inputs
• Modified G1 point addition and scalar multiplication to use pointer receivers for improved efficiency
• Added a new safeUnmarshalG2EIP196 function for G2 point unmarshalling with additional safety checks
• Updated the Java test file to reflect the new error message for invalid points outside the subgroup

These changes significantly improve the security and robustness of the BN254 curve operations, particularly in handling edge cases and invalid inputs.

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