@lumberyard-employee-dm suggestion to use (w)string_view as the src to simplify functions in conversions.h

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Code/Legacy/CrySystem/SystemWin32.cpp

@@ -126,7 +126,7 @@ const char* CSystem::GetUserName()
     DWORD dwSize = iNameBufferSize;
     wchar_t nameW[iNameBufferSize];
     ::GetUserNameW(nameW, &dwSize);
-    AZStd::to_string(szNameBuffer, iNameBufferSize, nameW, dwSize);
+    AZStd::to_string(szNameBuffer, iNameBufferSize, { nameW, dwSize });
     return szNameBuffer;
 #else
 #if defined(LINUX)

Code/Legacy/CrySystem/XConsole.cpp

@@ -2861,7 +2861,7 @@ void CXConsole::Paste()
             {
                 // Convert UCS code-point into UTF-8 string
                 AZStd::fixed_string<5> utf8_buf = {0};
-                AZStd::to_string(utf8_buf.data(), 5, &cp, 1);
+                AZStd::to_string(utf8_buf.data(), 5, { &cp, 1 });
                 AddInputUTF8(utf8_buf.c_str());
             }
         }