Fix S3453 FP: vb.net Delegate can't be Shared

[TimurKelman]

Description

We can't mark Delegate members as Shared.
This causes S3453, even though all other members (except the constructor) are Shared.

Reproducer

Friend NotInheritable Class Testing
    Private Sub New() : End Sub

    Delegate Function SomeDelegate() As Boolean
    Shared Sub SomeMethod(d As SomeDelegate) : End Sub
End Class

Product and Version

SonarQube for Visual Studio, Version: 10.7.0.17183