Add exception for Utf8JsonReader/Writer to AZC0014 (#8752)

* update

* update

* update

---------

Co-authored-by: Pan Shao <[email protected]>

Author: pshao25

src/dotnet/Azure.ClientSdk.Analyzers/Azure.ClientSdk.Analyzers.Tests/AZC0014Tests.cs

@@ -39,6 +39,8 @@ public class SomeClient
 
 
         [Theory]
+        [InlineData("public void JsonModelWriteCore(Utf8JsonWriter writer) {}")]
+        [InlineData("public void JsonModelCreateCore(ref Utf8JsonReader reader) {}")]
         [InlineData("internal class Class: System.IProgress<JsonElement> { public void Report (JsonElement value) {} }")]
         [InlineData("public void Report(string value) {}")]
         public async Task AZC0014NotProducedForNonPublicApisOrAllowedTypes(string usage)

src/dotnet/Azure.ClientSdk.Analyzers/Azure.ClientSdk.Analyzers/BannedAssembliesAnalyzer.cs

@@ -38,7 +38,10 @@ static void CheckType(ISymbolAnalysisContext context, ITypeSymbol type, ISymbol
                 {
                     if (BannedAssemblies.Contains(type.ContainingAssembly.Name))
                     {
-                        context.ReportDiagnostic(Diagnostic.Create(Descriptors.AZC0014, symbol.Locations.First(), BannedAssembliesMessageArgs), symbol);
+                        if (!IsUtf8JsonReaderWriter(type))
+                        {
+                            context.ReportDiagnostic(Diagnostic.Create(Descriptors.AZC0014, symbol.Locations.First(), BannedAssembliesMessageArgs), symbol);
+                        } 
                     }
 
                     if (namedTypeSymbol.IsGenericType)
@@ -86,5 +89,15 @@ static void CheckType(ISymbolAnalysisContext context, ITypeSymbol type, ISymbol
                     break;
             }
         }
+
+        private static bool IsUtf8JsonReaderWriter(ITypeSymbol type)
+        {
+            return (type.Name == "Utf8JsonReader" || type.Name == "Utf8JsonWriter") && GetFullNamespace(type.ContainingNamespace) == "System.Text.Json";
+        }
+
+        private static string GetFullNamespace(INamespaceSymbol namespaceSymbol)
+        {
+            return namespaceSymbol.ContainingNamespace.Name == "" ? namespaceSymbol.Name : $"{GetFullNamespace(namespaceSymbol.ContainingNamespace)}.{namespaceSymbol.Name}";
+        }
     }
 }