[Analyzers][CPP] Turn on rule 26497 (#23119)

* Turn on warning 26497
This function function-name could be marked constexpr if compile-time evaluation is desired.

* C++20 has constexpr swap

* as constexpr is not only for compile time,
make all functions that can be constexpr constexpr

* constexpr functions are implicity inline

src/modules/fancyzones/FancyZonesLib/MonitorUtils.cpp

@@ -207,7 +207,7 @@ namespace MonitorUtils
             return { .id = str.substr(0, dividerPos), .instanceId = str.substr(dividerPos + 1) };
         }
 
-        inline bool not_digit(wchar_t ch)
+        constexpr inline bool not_digit(wchar_t ch)
         {
             return '0' <= ch && ch <= '9';
         }