[HttpClient] fix dealing with 1xx informational responses #32141
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I never had a look at 1xx status codes until today.
This PR fixes reading them when using curl.
If one wonders:
NativeHttpClient
usesfopen()
, which skips informational parts as allowed by the HTTP spec and doesn't give any way to access their response headers.CurlHttpClient
allows reading informational responses using the progress callback or via the getInfo() method. That's the way if you need to implement e.g. HTTP 103 early hints.