Remove keywords from the proxy class and update public API

Author: MaggieKimani1

src/Microsoft.OpenApi/Models/References/OpenApiSchemaReference.cs

@@ -80,10 +80,6 @@ internal OpenApiSchemaReference(OpenApiSchema target, string referenceId)
         /// <inheritdoc/>
         public override string DynamicAnchor { get => Target.DynamicAnchor; set => Target.DynamicAnchor = value; }
         /// <inheritdoc/>
-        public override string RecursiveAnchor { get => Target.RecursiveAnchor; set => Target.RecursiveAnchor = value; }
-        /// <inheritdoc/>
-        public override string RecursiveRef { get => Target.RecursiveRef; set => Target.RecursiveRef = value; }
-        /// <inheritdoc/>
         public override IDictionary<string, OpenApiSchema> Definitions { get => Target.Definitions; set => Target.Definitions = value; }
         /// <inheritdoc/>
         public override decimal? V31ExclusiveMaximum { get => Target.V31ExclusiveMaximum; set => Target.V31ExclusiveMaximum = value; }

test/Microsoft.OpenApi.Tests/PublicApi/PublicApi.approved.txt

@@ -469,6 +469,8 @@ namespace Microsoft.OpenApi.Models
         public const string PropertyName = "propertyName";
         public const string Put = "put";
         public const string ReadOnly = "readOnly";
+        public const string RecursiveAnchor = "$recursiveAnchor";
+        public const string RecursiveRef = "$recursiveRef";
         public const string RefreshUrl = "refreshUrl";
         public const string RequestBodies = "requestBodies";
         public const string RequestBody = "requestBody";