[Analyzers][CPP] turn on Warning 4100 (#21449)

* Analyzers CPP

Changing the warning level from 3 to 4.
change some project files to make them use the warning config in cpp props file.

* Analyzers C++ turn on warning 4706

Change Cpp.Build.props file to enable 4706
fix BugReportTool code to get rid of 4706

* Turn on warning 4100 and fix the code

* Follow c++ core guidelines

* Adapting to PR comments

src/common/interop/HotkeyManager.cpp

@@ -24,7 +24,7 @@ HotkeyManager::~HotkeyManager()
 }
 
 // When all Shortcut keys are pressed, fire the HotkeyCallback event.
-void HotkeyManager::KeyboardEventProc(KeyboardEvent ^ ev)
+void HotkeyManager::KeyboardEventProc(KeyboardEvent ^ /*ev*/)
 {
     // pressedKeys always stores the latest keyboard state
     auto pressedKeysHandle = GetHotkeyHandle(pressedKeys);