perf: duplicate semantic model calls

[daveoftheparty]

InterfaceStore has a lot of duplicate method calls against the SemanticModel, such as below:

.Select(prop => new 
{
    Namespace = node.Model.GetDeclaredSymbol(prop.Parent)?.ContainingSymbol?.ToString(),
    InterfaceName = node.Model.GetDeclaredSymbol(prop.Parent).Name,
    TypeArguments = GetInterfaceTypeArguments(node.Model.GetDeclaredSymbol(prop.Parent).Name, node.Model, prop.Parent),
    SourceFile = string.IsNullOrWhiteSpace(prop?.Parent.SyntaxTree.FilePath) ? uriAsFile : prop.Parent.SyntaxTree.FilePath,
    PropertyName = prop.Identifier.Text
})

This happened through evolution of the code, maybe red-green then -oops-forgot-to-refactor

There may be a performance improvement here by converting the code to something like:

.Select(prop => 
{
    var parentSymbol = node.Model.GetDeclaredSymbol(prop.Parent);
    return new 
    {
        Namespace = parentSymbol?.ContainingSymbol?.ToString(),
        InterfaceName = parentSymbol.Name,
        TypeArguments = GetInterfaceTypeArguments(parentSymbol.Name, node.Model, prop.Parent),
        SourceFile = string.IsNullOrWhiteSpace(prop?.Parent.SyntaxTree.FilePath) ? uriAsFile : prop.Parent.SyntaxTree.FilePath,
        PropertyName = prop.Identifier.Text
    };
})