Fix task-adjacent search path in roles

[s-hertel]

SUMMARY

Fixes #82695

Fix searching relative to the current task file's directory for as documented in https://docs.ansible.com/ansible/latest/playbook_guide/playbook_pathing.html#resolving-local-relative-paths (item 3):

Specifically, Ansible tries to find the file in the following order:
  1. In the current role.
      1. In its appropriate subdirectory: “files”, “vars”, “templates”, or “tasks”; depending on the kind of file Ansible is searching for.
      2. Directly in its directory.
  2. Like 1, in the parent role that called into this current role with include_role, import_role, or with a role dependency. If the parent role has its own parent role, Ansible will repeat this step with that role.
  3. Like 1, in the current task file’s directory.
  4. Like 1, in the current play file’s directory.

ISSUE TYPE

• Bugfix Pull Request

[webknjaz]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[s-hertel]

Here's the documentation change that added the first reference to the "task file's directory" #73818. I don't think the documentation was entirely correct at the time it was added, since lookups didn't correctly identify roles prior to #82290 (3 and 4 would have worked but not 1 and 2).

[tolland]

This is also a problem on the stable-16 branch. would be good to fix there as well. Thanks!