Fix S3993 FP: Parent Attribute Class has defined AttributeUsage

[zsolt-kolbay-sonarsource]

Description

Currently, S3993 raises an issue when the attribute class isn't decorated with [AttributeUsage], but one of its ancestors is. In this case, the information is inherited by the derived attribute, so it isn't necessary to add it. The rule currently advocates doing so for the sake of readability.
We're promoting the rule to Sonar-way, so it's better to make it more lenient for these kinds of scenarios.

Repro steps

[AttributeUsage(AttributeTargets.Class)]
public class BaseAttribute : Attribute
{
}

public class DerivedAttribute : BaseAttribute   // Noncompliant - FP
{
}

Related information

• C#/VB.NET Plugins version: 9.31
• Visual Studio version: Visual Studio 2022 (17.10)
• MSBuild / dotnet version: .NET 8.0
• Operating System: Windows 10

[zsolt-kolbay-sonarsource]

Not implementing this fix to keep the rule consistent with CA1018 Roslyn analyzer.