uri: check unexpected failure doesn't occur when file cannot be saved (#45824)

* uri: fix TypeError when file can't be saved

Fix the following exception (and others):

    Traceback (most recent call last):
      File "/home/lilou/debug_dir/__main__.py", line 604, in <module>
        main()
      File "/home/lilou/debug_dir/__main__.py", line 554, in main
        write_file(module, url, dest, content, resp)
      File "/home/lilou/debug_dir/__main__.py", line 320, in write_file
        module.fail_json(msg="Destination dir '%s' not writable" % os.path.dirname(dest), **resp)
    TypeError: fail_json() got multiple values for keyword argument 'msg'

I would rather remove **resp from returned values but this module is
flagged as stableinterface.

* Static imports are more straight forward and preferred unless dynamic inclusion is required.

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

@@ -488,13 +488,16 @@
       - result.json.json[0] == 'JSON Test Pattern pass1'
 
 - name: Test follow_redirects=none
-  include_tasks: redirect-none.yml
+  import_tasks: redirect-none.yml
 
 - name: Test follow_redirects=safe
-  include_tasks: redirect-safe.yml
+  import_tasks: redirect-safe.yml
 
 - name: Test follow_redirects=urllib2
-  include_tasks: redirect-urllib2.yml
+  import_tasks: redirect-urllib2.yml
 
 - name: Test follow_redirects=all
-  include_tasks: redirect-all.yml
+  import_tasks: redirect-all.yml
+
+- name: Check unexpected failures
+  import_tasks: unexpected-failures.yml

test/integration/targets/uri/tasks/unexpected-failures.yml

@@ -0,0 +1,27 @@
+---
+# same as expanduser & expandvars called on managed host
+- command: 'echo {{ output_dir }}'
+  register: echo
+
+- set_fact:
+    remote_dir_expanded: '{{ echo.stdout }}'
+
+- name: ensure test directory doesn't exist
+  file:
+    path: '{{ output_dir }}/non/existent/path'
+    state: absent
+
+- name: destination doesn't exist
+  uri:
+    url: 'https://{{ httpbin_host }}/get'
+    dest: '{{ output_dir }}/non/existent/path'
+  ignore_errors: true
+  register: ret
+
+- name: check that unexpected failure didn't happen
+  assert:
+    that:
+      - ret is failed
+      - "not ret.msg.startswith('MODULE FAILURE')"
+      - '"Destination dir ''" ~ remote_dir_expanded ~ "/non/existent'' not writable" in ret.msg'
+      - ret.status == 200