Remove wstring variants of string utils functions

* When needed on windows we convert to/from UTF-8. For most places this is easy
  enough, the callstack processing is now moved to store most data as UTF-8 in
  the first place.

renderdoc/common/common.cpp

@@ -406,7 +406,7 @@ void rdclog_direct(time_t utcTime, uint32_t pid, LogType type, const char *proje
   char location[64] = {0};
 #if ENABLED(INCLUDE_LOCATION_IN_LOG)
   string loc;
-  loc = basename(string(file));
+  loc = get_basename(string(file));
   StringFormat::snprintf(location, 63, "% 20s(%4d) - ", loc.c_str(), line);
 #endif