chore!: remove excluded users from ListUsers response

[ewanharris]

Description

Removes excluded_users from the response of all SDKs as it was removed from OpenFGA with openfga/api#171.

This feature was originally a well-intentioned way to communicate any negations that may exist on public-typed wildcard (e.g. user:*) as a means of being abundantly clear about what a user:* result entails. However, as we discover more possible situations where excluded users could arise, we realize that we were making a premature decision about the API. We fully intend to re-add excluded_users at some point in the future but may or may not be a flattened list as previously implemented.

Please note:

• This is technically a breaking but is acceptable provided that the ListUsers API is still experimental

References

• Related PR in openfga/sdk-generator: Removing excluded users from ListUsers response sdk-generator#377
• Related PR in openfga/api: Removing excluded users api#171

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.57%. Comparing base (914cf92) to head (cc4e4b4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #112   +/-   ##
=======================================
  Coverage   83.57%   83.57%           
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  Files          18       18           
  Lines         968      968           
  Branches      220      220           
=======================================
  Hits          809      809           
  Misses         76       76           
  Partials       83       83           

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