[Katana] Allow choosing the class in the genesis file without affecting the actual class hash

[Yogalholic]

Description

Add a name field in GenesisClassJson that allows class identification by a unique name rather than by hash in Katana

Related issue

Fixes #<1502>

Tests

• [ X] Yes
• [ ] No, because they aren't needed
• [ ] No, because I need help

Added to documentation?

• [ ] README.md
• [ ] Dojo Book
• [ X] No documentation needed

Checklist

• [X ] I've formatted my code (scripts/prettier.sh, scripts/rust_fmt.sh, scripts/cairo_fmt.sh)
• [X ] I've linted my code (scripts/clippy.sh, scripts/docs.sh)
• [X ] I've commented my code
• [X ] I've requested a review after addressing the comments