Inline Hints - Don't allow double click and insert params arguments (#68434)

* don't insert params args

* fix tests

Author: akhera99

src/EditorFeatures/Test2/InlineHints/CSharpInlineParameterNameHintsTests.vb

@@ -458,7 +458,7 @@ class A
 
     public void Main(string[] args)
     {
-        UseParams(list: 1, 2, 3, 4, 5, 6); 
+        UseParams(1, 2, 3, 4, 5, 6); 
     } 
 }
                     </Document>

src/EditorFeatures/Test2/InlineHints/VisualBasicInlineParameterNameHintsTests.vb

@@ -466,7 +466,7 @@ Namespace Microsoft.CodeAnalysis.Editor.UnitTests.InlineHints
 		                    End Sub
 
 		                    Public Sub Main()
-			                    UseParams(args:=1, 2, 3, 4, 5)
+			                    UseParams(1, 2, 3, 4, 5)
 		                    End Sub
 	                    End Class
                     </Document>

src/Features/Core/Portable/InlineHints/AbstractInlineParameterNameHintsService.cs

@@ -102,10 +102,17 @@ void AddHintsIfAppropriate(SyntaxNode node)
                     {
                         var inlineHintText = GetReplacementText(parameter.Name);
                         var textSpan = new TextSpan(position, 0);
+
+                        TextChange? replacementTextChange = null;
+                        if (!parameter.IsParams)
+                        {
+                            replacementTextChange = new TextChange(textSpan, inlineHintText);
+                        }
+
                         result.Add(new InlineHint(
                             textSpan,
                             ImmutableArray.Create(new TaggedText(TextTags.Text, parameter.Name + ": ")),
-                            new TextChange(textSpan, inlineHintText),
+                            replacementTextChange,
                             ranking: InlineHintsConstants.ParameterRanking,
                             InlineHintHelpers.GetDescriptionFunction(position, parameter.GetSymbolKey(cancellationToken: cancellationToken), displayOptions)));
                     }