chore: switch to Rust edition 2024

[hanabi1224]

Summary of changes

Changes introduced in this pull request:

• use Rust edition 2024
• resolve naming conflicts with the new reserved keyword gen
• fix build errors
• fix formatting

Reference issue to close (if applicable)

Closes #5327

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

[hanabi1224]

Hmm, apparently, rust2go generated code is not edition2024 compatible.