Update test snapshots and regenerate examples for Omit discriminator changes
- Updated discriminator test snapshots (3.0.x and 3.1.x) for:
- discriminator-all-of
- discriminator-allof-nested
- transformers-all-of
- Regenerated openapi-ts-fetch example with updated types
- All snapshots now reflect the Omit<> wrapper for discriminator properties
Co-authored-by: mrlubos <12529395+mrlubos@users.noreply.github.com>