Test that we can override variables set in inventory when the vars_file name is templated

Fixes #8903

test/integration/inventory

@@ -6,6 +6,13 @@ testhost2 ansible_ssh_host=127.0.0.1 ansible_connection=local
 # by (preferred) group_vars/ and host_vars/ variables
 # and are used in testing of variable precedence
 
+[inven_overridehosts]
+invenoverride ansible_ssh_host=127.0.0.1 ansible_connection=local
+
+[inven_overridehosts:vars]
+foo=foo
+var_dir=vars
+
 [arbitrary_parent:children]
 local
 

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

+---
+- debug: var=foo
+- assert:
+    that:
+    - 'foo == "bar"'

test/integration/test_var_precedence.yml

@@ -26,3 +26,11 @@
         - 'vars_files_var == "vars_files_var"'
         - 'vars_files_var_role == "vars_files_var_role3"'
         - 'registered_var == "this is from set_fact"'
+
+- hosts: inven_overridehosts
+  vars_files:
+  - "{{ var_dir }}/test_var_precedence.yml"
+  roles:
+  - role: test_var_precedence_inven_override
+    foo: bar
+