Regenerate the synchronous client with openapi-generator 7.25.0

Picks up the load_kube_config environment-proxy fix (#2681), native
proxy_ssl_context support (#2387), content-type parameter handling,
lowercase boolean query parameters, and null-preserving list and map
serialization.

Regenerate the local patches against the new output. The client-go
retry patch now carries context lines: its zero-context hunks applied
at fixed offsets, so lines added above them by the generator shift the
insertion point without failing the apply.