MSTEST0026 (Avoid conditional access in assertions) false positive for conditional access in message/messageArgs

[Youssef1313]

The following analyzer unit test should pass

    [TestMethod]
    public async Task WhenUsingConditionalsAccess_In_Message_NoDiagnostic()
    {
        string code = """
            #nullable enable
            using System.Text.RegularExpressions;
            using Microsoft.VisualStudio.TestTools.UnitTesting;
            using System.Collections.Generic;

            public class A
            {
                public string? S { get; set; }
                public Regex? R { get; set; }
            }

            [TestClass]
            public class MyTestClass
            {
                [TestMethod]
                public void Compliant()
                {
                    Assert.AreEqual(new object(), new object(), new A().S?.Length.ToString());
                }
            }
            """;

        await VerifyCS.VerifyAnalyzerAsync(code);
    }

But it fails:

    Test method MSTest.Analyzers.UnitTests.AssertionArgsShouldAvoidConditionalAccessAnalyzerTests.WhenUsingConditionalsAccess_In_Message_NoDiagnostic threw exception: 
System.InvalidOperationException: Context: Diagnostics of test state
Mismatch between number of diagnostics returned, expected "0" actual "1"

Diagnostics:
// /0/Test0.cs(18,9): info MSTEST0026: Prefer adding an additional assertion that checks for null
VerifyCS.Diagnostic().WithSpan(18, 9, 18, 82),