Policy-based authorization article overhaul

[guardrex]

Fixes #35817

🚧 👷‍♀️ WIP 👷‍♂️ 🏗️

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aspnetcore/migration/22-to-30.md	aspnetcore/migration/22-to-30
aspnetcore/migration/70-to-80.md	aspnetcore/migration/70-to-80
aspnetcore/mvc/security/authorization/policies.md	aspnetcore/mvc/security/authorization/policies
aspnetcore/mvc/security/authorization/resource-based.md	aspnetcore/mvc/security/authorization/resource-based
aspnetcore/razor-pages/security/authorization/policies.md	aspnetcore/razor-pages/security/authorization/policies
aspnetcore/razor-pages/security/authorization/resource-based.md	aspnetcore/razor-pages/security/authorization/resource-based
aspnetcore/release-notes/aspnetcore-5.0.md	aspnetcore/release-notes/aspnetcore-5.0
aspnetcore/security/authorization/custom-authorization-policies-with-iauthorizationrequirementdata.md	aspnetcore/security/authorization/custom-authorization-policies-with-iauthorizationrequirementdata
aspnetcore/security/authorization/customizingauthorizationmiddlewareresponse.md	aspnetcore/security/authorization/customizingauthorizationmiddlewareresponse
aspnetcore/security/authorization/dependencyinjection.md	aspnetcore/security/authorization/dependencyinjection
aspnetcore/security/authorization/iauthorizationpolicyprovider.md	aspnetcore/security/authorization/iauthorizationpolicyprovider
aspnetcore/security/authorization/policies.md	aspnetcore/security/authorization/policies
aspnetcore/security/authorization/resource-based.md	aspnetcore/security/authorization/resource-based
aspnetcore/security/how-to-choose-identity-solution.md	aspnetcore/security/how-to-choose-identity-solution
aspnetcore/toc.yml	aspnetcore/toc