Add win_script become tests (#85079)

test/integration/targets/win_script/tasks/main.yml

@@ -312,6 +312,20 @@
     - test_script_result_become.stdout_lines[0]|lower == 'nt authority\\system'
     - test_script_result_become.stdout_lines[1] == 'finished'
 
+- name: run test script with become set by vars
+  script: test_script_whoami.ps1
+  register: test_script_result_become_vars
+  vars:
+    ansible_become: yes
+    ansible_become_user: SYSTEM
+    ansible_become_method: runas
+
+- name: check that the script ran and we get both outputs on new lines
+  assert:
+    that:
+    - test_script_result_become_vars.stdout_lines[0]|lower == 'nt authority\\system'
+    - test_script_result_become_vars.stdout_lines[1] == 'finished'
+
 - name: run script that emits stderr from sub process
   script: test_script_with_native_stderr.ps1
   register: script_stderr