Update SupportsDeferredBinding diagnostic code & update docs (#1377)

Author: liliankasem

docs/analyzer-rules/AZFW0009.md

@@ -0,0 +1,26 @@
+# AZFW0009: Invalid use of SupportsDeferredBinding attribute
+
+| | Value |
+|-|-|
+| **Rule ID** |AZFW0009|
+| **Category** |[Usage]|
+| **Severity** |Error|
+
+## Cause
+
+This rule is triggered when the `SupportsDeferredBinding` attribute is used on any class other
+than an input (`InputBindingAttribute`) or trigger (`TriggerBindingAttribute`) binding based class.
+
+## Rule description
+
+The `SupportsDeferredBinding` attribute is used to determine if a binding supports deferred binding.
+Currently, this feature is only supported for input and trigger bindings. Output bindings are not supported
+and this attribute should not be used on any other class type.
+
+## How to fix violations
+
+Remove the use of the `SupportsDeferredBinding` attribute from your class.
+
+## When to suppress warnings
+
+This rule should not be suppressed because this error may prevent your Azure Functions from running.

sdk/Sdk.Analyzers/DiagnosticDescriptors.cs

@@ -22,7 +22,7 @@ private static DiagnosticDescriptor Create(string id, string title,string messag
                 category: Constants.DiagnosticsCategories.Usage, severity: DiagnosticSeverity.Error);
 
         public static DiagnosticDescriptor DeferredBindingAttributeNotSupported{ get; }
-            = Create(id: "AZFW0003", title: "Invalid class attribute", messageFormat: "The attribute '{0}' can only be used on trigger and input binding attributes.",
+            = Create(id: "AZFW0009", title: "Invalid class attribute", messageFormat: "The attribute '{0}' can only be used on trigger and input binding attributes.",
                 category: Constants.DiagnosticsCategories.Usage, severity: DiagnosticSeverity.Error);
 
     }