* Run no-unwanted-files sanity test only on Ansible.
Since collections should be able to use binary modules there is not really any limit on what could exist in a collection `plugins` directory.
* Add support for symlinks in sanity target lists:
- Sanity tests that need to analyze symlinks can do so using the supplied target list.
- Tests that analyze directories will now only look at symlinks if requested.
- Directory symlinks will now be seen as directories instead of files.
* Enable symlinks on filename based sanity tests.
Sanity tests that evalulate filenames instead of content should include symlinks.
* Update symlinks sanity test.
Use the sanity test target list now that it can include symlinks.
* add subdir support to collection loading
* collections may now load plugins from subdirs under a plugin type or roles dir, eg `ns.coll.subdir1.subdir2.myrole`->ns.coll's roles/subdir1/subdir2/myrole, `ns.coll.subdir1.mymodule`->ns.coll's plugins/modules/subdir1/mymodule.py
* centralize parsing/validation in AnsibleCollectionRef class
* fix issues loading Jinja2 plugins from multiple sources
* resolves#59462, #59890,
* sanity test fixes
* string fixes
* add changelog entry
* Relocate ansible-only sanity tests.
* Get "code smell" sanity tests from multiple dirs.
- `test/lib/ansible_test/_data/sanity/code-smell/` - General purpose tests used for both Ansible and Ansible Collections.
- `test/sanity/code-smell/` - Tests specific to Ansible, will not be used for Ansible Collections.
