Fix pacman stdout parsing in the Ansible module (#65238)

pacman output is localized and the Ansible module is parsing its output.
So, we need to force the locale.
Add changelog fragment

Fixes #65237

changelogs/fragments/65238-fix_pacman_stdout_parsing.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - pacman - Fix pacman output parsing on localized environment. (https://github.com/ansible/ansible/issues/65237)

lib/ansible/modules/packaging/os/pacman.py

@@ -433,6 +433,7 @@ def main():
     )
 
     pacman_path = module.get_bin_path('pacman', True)
+    module.run_command_environ_update = dict(LC_ALL='C')
 
     p = module.params