in_opentelemetry: fixed a wrong data type used for an option

Signed-off-by: Leonardo Alminana <leonardo.alminana@chronosphere.io>

plugins/in_opentelemetry/opentelemetry.h

@@ -35,7 +35,7 @@ struct flb_opentelemetry {
     flb_sds_t listen;
     flb_sds_t tcp_port;
     const char *tag_key;
-    bool raw_traces;
+    int raw_traces;
     int  tag_from_uri;
     flb_sds_t logs_metadata_key;