[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/ShortcutGuide/ShortcutGuide/shortcut_guide.cpp

@@ -115,12 +115,12 @@ namespace
         return true;
     }
 
-    bool isWin(int key)
+    constexpr bool isWin(int key)
     {
         return key == VK_LWIN || key == VK_RWIN;
     }
 
-    bool isKeyDown(LowlevelKeyboardEvent event)
+    constexpr bool isKeyDown(LowlevelKeyboardEvent event)
     {
         return event.wParam == WM_KEYDOWN || event.wParam == WM_SYSKEYDOWN;
     }