Preserve permissions when copying lambdas (ansible-collections#167)

ansible/ansible/pull/69993 changed copy's mode behaviour. Lambda tests
which copy files to '{{ outpur_dir }}' before zipping are now being
unzipped by Lambda with incorrect permissions, causing test failures.

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections/community.aws@1b1dbee

tests/integration/targets/lambda_policy/tasks/main.yml

@@ -59,6 +59,7 @@
     copy:
       src: mini_http_lambda.py
       dest: '{{output_dir}}/mini_http_lambda.py'
+      mode: preserve
   - name: bundle lambda into a zip
     register: zip_res
     archive: