build: select C/C++ language standard with ClCompile options

This avoids passing the `-std:c++20` flag while compiling C code.

Co-authored-by: Daniel Lemire <[email protected]>

Author: targos

common.gypi

@@ -284,10 +284,11 @@
     ],
     'msvs_settings': {
       'VCCLCompilerTool': {
+        # -std:c++20
+        'LanguageStandard': 'stdcpp20',
+        'LanguageStandard_C': 'stdc11',
         'AdditionalOptions': [
           '/Zc:__cplusplus',
-          # The following option enables c++20 on Windows. This is needed for V8 v12.4+
-          '-std:c++20',
           # The following option reduces the "error C1060: compiler is out of heap space"
           '/Zm2000',
         ],