Curl: Remove guard from certain parsing logic

The `#curl_http_content_headers_and_checksum` method previously
parsed responses from `curl` output even if `status.success?` wasn't
`true`. A recent commit of mine moved the parsing logic behind this
guard but it's now leading to a "...is not reachable" error when a URL
involves a large download that takes longer than 25 seconds to finish
and hits the timeout.

This commit resolves the issue for the time being by moving related
logic back to its previous location, where it isn't guarded by
`status.success?`.

Library/Homebrew/utils/curl.rb

@@ -345,20 +345,20 @@ module Utils
         user_agent:        user_agent
       )
 
+      parsed_output = parse_curl_output(output)
+      responses = parsed_output[:responses]
+
+      final_url = curl_response_last_location(responses)
+      headers = if responses.last.present?
+        status_code = responses.last[:status_code]
+        responses.last[:headers]
+      else
+        {}
+      end
+      etag = headers["etag"][ETAG_VALUE_REGEX, 1] if headers["etag"].present?
+      content_length = headers["content-length"]
+
       if status.success?
-        parsed_output = parse_curl_output(output)
-        responses = parsed_output[:responses]
-
-        final_url = curl_response_last_location(responses)
-        headers = if responses.last.present?
-          status_code = responses.last[:status_code]
-          responses.last[:headers]
-        else
-          {}
-        end
-        etag = headers["etag"][ETAG_VALUE_REGEX, 1] if headers["etag"].present?
-        content_length = headers["content-length"]
-
         file_contents = File.read(file.path)
         file_hash = Digest::SHA2.hexdigest(file_contents) if hash_needed
       end