[Build] Multiple CURL packages leads to invalid build (#1738) (#1739)

Author: marcalff

ext/include/opentelemetry/ext/http/client/curl/http_operation_curl.h

@@ -20,7 +20,7 @@
 #  include <poll.h>
 #  include <unistd.h>
 #endif
-#include <curl/curl.h>
+#include "curl/curl.h"
 
 OPENTELEMETRY_BEGIN_NAMESPACE
 namespace ext