This commit adds support for Void response body types in the WebClient, both when using `exchange` with a response.bodyToMono(Void.class), as well as using `retrieve` with `toEntity(Void.class)`. Issue: SPR-15679
This commit adds support for Void response body types in the WebClient, both when using `exchange` with a response.bodyToMono(Void.class), as well as using `retrieve` with `toEntity(Void.class)`. Issue: SPR-15679