venv: also install the versioned launchers

Like on Linux we provide python3.x globally, so make
sure those also exist in the venv, so when python3.x is run
the venv version is launched and not the global one.

Author: lazka

Lib/venv/__init__.py

@@ -376,8 +376,18 @@ def setup_python(self, context):
                     f'pythonw{exe_t}{exe_d}.exe': pythonw_exe,
                 }
 
+            if sys._is_mingw:
+                for key, value in list(link_sources.items()):
+                    if key.startswith('python'):
+                        link_sources[key.replace('python', 'python3')] = value
+                        link_sources[key.replace('python', f'python3.{sys.version_info[1]}')] = value
+                for key, value in list(copy_sources.items()):
+                    if key.startswith('python'):
+                        copy_sources[key.replace('python', 'python3')] = value
+                        copy_sources[key.replace('python', f'python3.{sys.version_info[1]}')] = value
+
             do_copies = True
-            if self.symlinks:
+            if self.symlinks and not sys._is_mingw:
                 do_copies = False
                 # For symlinking, we need all the DLLs to be available alongside
                 # the executables.