std.http.Client: discard response body when reusing connection
When an error response was encountered, such as 404 not found, the body
wasn't discarded, leading to the string "404 not found" being
incorrectly interpreted as the next request's response.
closes #24732
89c9282d34Andrew Kelley committed on 8/19/2025, 12:26:55 AMparentb734d03