* [C] Add test schemas for the recent changes
The recent commit 47665aaa97cb ("Fix a few issues with the C generator
(part 1 version 2) (#14434)") didn't include any test schemas. Add them
now, as requested:
https://github.com/OpenAPITools/openapi-generator/pull/14434#issuecomment-2497497110
* Update samples
* Fix sample update with missing files
* More fixes for sample updates
