Sort the authz roles in ListRoles response

[rdimitrov]

Summary

The following PR:

• Sort the authz roles in ListRoles response
• Renames a few variables to fix linter warnings

Fixes #3855

Change Type

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• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

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Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 53.077% (-0.02%) from 53.096%
when pulling a68babf on sort-roles
into 9a2ccaa on main.

[eleftherias]

Out of curiosity, why do the roles need to be sorted?

[rdimitrov]

Out of curiosity, why do the roles need to be sorted?

I should have mentioned this, but the sole reason was a request from FE that it makes it easier for clients to show the available roles based on the level of permissions each role has, i.e. admin is more permissive than editor.