Pass windows command as-is without splitting/rejoining parameters.

* Fixes extra spaces added between parameters from https://github.com/ansible/ansible-modules-core/issues/1929
* Correctly decode PowerShell command encoded as UTF-16-LE so that it displays correctly in debug messages, fixes the other issue from https://github.com/ansible/ansible-modules-core/issues/1929
* Add test to verify that script parameters are passed as-is, so $true is interpreted as a boolean, fixes https://github.com/ansible/ansible/issues/10947

test/integration/roles/test_win_raw/tasks/main.yml

@@ -92,3 +92,12 @@
   assert:
     that:
       - "raw_result.stdout_lines[0] == 'wwe=raw'"
+
+- name: run a raw command with unicode chars and quoted args (from https://github.com/ansible/ansible-modules-core/issues/1929)
+  raw: Write-Host --% icacls D:\somedir\ /grant "! ЗАО. Руководство":F
+  register: raw_result2
+
+- name: make sure raw passes command as-is and doesn't split/rejoin args
+  assert:
+    that:
+      - "raw_result2.stdout_lines[0] == '--% icacls D:\\\\somedir\\\\ /grant \"! ЗАО. Руководство\":F'"