Fix route syntax highlighting parameter color (#46208)

Author: JamesNK

src/Framework/App.Ref/src/CompatibilitySuppressions.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- https://learn.microsoft.com/en-us/dotnet/fundamentals/package-validation/diagnostic-ids -->
-<Suppressions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+<Suppressions xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <Suppression>
     <DiagnosticId>PKV004</DiagnosticId>
     <Target>net7.0</Target>

src/Framework/App.Runtime/src/CompatibilitySuppressions.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- https://learn.microsoft.com/en-us/dotnet/fundamentals/package-validation/diagnostic-ids -->
-<Suppressions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+<Suppressions xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <Suppression>
     <DiagnosticId>PKV0001</DiagnosticId>
     <Target>net7.0</Target>

src/Framework/AspNetCoreAnalyzers/src/Analyzers/RouteEmbeddedLanguage/RoutePatternClassifier.cs

@@ -94,7 +94,12 @@ public void Visit(RoutePatternCatchAllParameterPartNode node)
 
         public void Visit(RoutePatternNameParameterPartNode node)
         {
-            AddClassification(node.ParameterNameToken, ClassificationTypeNames.ParameterName);
+            // Parameter name should look like a regular parameter.
+            // ClassificationTypeNames.ParameterName isn't working so temporarily reuse color from JSON syntax:
+            // https://github.com/dotnet/roslyn/blob/e1ee2f544a7a4f8d536278bed4e180c54919276e/src/Workspaces/Core/Portable/Classification/ClassificationTypeNames.cs#L181
+            //
+            // TODO: Fix properly with https://github.com/dotnet/aspnetcore/issues/46207
+            AddClassification(node.ParameterNameToken, "json - object");
         }
 
         public void Visit(RoutePatternPolicyParameterPartNode node)

src/Framework/AspNetCoreAnalyzers/test/RouteEmbeddedLanguage/RoutePatternClassifierTests.cs

@@ -152,4 +152,6 @@ public void TestAction()
 Regex.CharacterClass("one"),
 Regex.CharacterClass("]"));
     }
+
+    private static FormattedClassification Parameter(string name) => new FormattedClassification(name, "json - object");
 }