* Fix validate-modules support for collections.
- Relative imports now work correctly.
- The collection loader is now used.
- Modules are invoked as `__main__`.
* Remove obsolete validate-modules code ignores.
* Handle sys.exit in validate-modules.
* Add check for AnsibleModule initialization.
* Remove `missing-module-utils-import` check.
This check does not support relative imports or collections.
Instead of trying to overhaul the test, we can rely on the `ansible-module-not-initialized` test instead.
* Fix badly named error codes with `c#` in the name.
The `#` conflicts with comments in the sanity test ignore files.
* Add changelog entries.
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