Pin sanitizer flags OFF in standard presets

Prevents stale BUILD_WITH_ASAN/BUILD_WITH_VALGRIND values in the CMake
cache from leaking into default/release/debug configure runs after a
prior sanitizer preset.

Author: fdcastel

CMakePresets.json

@@ -12,23 +12,29 @@
             "description": "Default preset — uses 'build/' as the binary directory so that all tools (command-line, Visual Studio, CLion, VS Code) share the same layout.",
             "binaryDir": "${sourceDir}/build",
             "cacheVariables": {
-                "CMAKE_INSTALL_PREFIX": "${sourceDir}/install"
+                "CMAKE_INSTALL_PREFIX": "${sourceDir}/install",
+                "BUILD_WITH_ASAN": "OFF",
+                "BUILD_WITH_VALGRIND": "OFF"
             }
         },
         {
             "name": "release",
             "displayName": "Release",
             "inherits": "default",
             "cacheVariables": {
-                "CMAKE_BUILD_TYPE": "Release"
+                "CMAKE_BUILD_TYPE": "Release",
+                "BUILD_WITH_ASAN": "OFF",
+                "BUILD_WITH_VALGRIND": "OFF"
             }
         },
         {
             "name": "debug",
             "displayName": "Debug",
             "inherits": "default",
             "cacheVariables": {
-                "CMAKE_BUILD_TYPE": "Debug"
+                "CMAKE_BUILD_TYPE": "Debug",
+                "BUILD_WITH_ASAN": "OFF",
+                "BUILD_WITH_VALGRIND": "OFF"
             }
         },
         {