Allow `explode:true` for `style:pipeDelimited` and `style:spaceDelimited`

Result of https://github.com/OAI/OpenAPI-Specification/issues/3737#issuecomment-2072939018

Also references the [swagger query examples](https://swagger.io/docs/specification/serialization/#query) which suggest that `explode:true` is allowed for `style:spaceDelimited` and`style:pipeDelimited` but simply that it would look exactly like the default (`style:form, explode:true`)