Rename T files to avoid name clashes

There is already common/utils/config.h. This file(name) is hardcoded as
it is included into asn1c, and cannot be renamed. To avoid a name clash
and confusing, we rename T's config.h/c to configuration.h/c.

common/utils/T/tracer/to_vcd.c

@@ -8,7 +8,7 @@
 #include "database.h"
 #include "utils.h"
 #include "handler.h"
-#include "config.h"
+#include "configuration.h"
 #include "logger/logger.h"
 #include "view/view.h"