RS1008 not reported on ISymbol fields of diagnostic analyzer

[Rekkonnect]

Analyzer

Diagnostic ID: RS1008: Avoid storing per-compilation data into the fields of a diagnostic analyzer

Analyzer source

Microsoft.CodeAnalysis.CSharp.Analyzers 3.3.4

Describe the bug

The above diagnostic is not reported on field instances of type ISymbol, but it is correctly reported on other relevant types like IMethodSymbol, INamedTypeSymbol, Compilation, etc.

Example Code

Consider the following analyzer:

[DiagnosticAnalyzer(LanguageNames.CSharp)]
public class TestAnalyzer : DiagnosticAnalyzer
{
    private ISymbol _symbol;

    public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
        => ImmutableArray<DiagnosticDescriptor>.Empty;

    public override void Initialize(AnalysisContext context)
    {
        context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.ReportDiagnostics);
        context.EnableConcurrentExecution();
    }
}

Expected behavior

A warning should be reported on the type of the field _symbol, like it would if the field's type was IMethodSymbol, INamedTypeSymbol, etc.

Actual behavior

The warning is not present.

[mpidash]

Fields of type IOperation are also not reported.
It seems that the analyzer only checks if the field type implements IOperation or ISymbol, but not if it is an exact match.

I will prepare a PR for this issue.