git_config - fixed bug with scope file (#2125)

* fixed bug

- scope file was not working
- added test to guarantee that behaviour
- marked integration test as destructive, because it overwrites ~/.gitconfig

* added changelog fragment

* Update tests/integration/targets/git_config/tasks/setup_no_value.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update tests/integration/targets/git_config/tasks/get_set_state_present_file.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update tests/integration/targets/git_config/tasks/get_set_state_present_file.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update tests/integration/targets/git_config/aliases

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update changelogs/fragments/2125-git-config-scope-file.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/git_config/tasks/setup_value.yml

@@ -5,4 +5,9 @@
   copy:
     src: gitconfig
     dest: ~/.gitconfig
-...
+
+- name: set up with value (file)
+  copy:
+    src: gitconfig
+    dest: "{{ output_dir }}/gitconfig_file"
+...