Keep parameter casing when generating Immutable Record mapped through constructor. Fixes MapsterMapper/Mapster#358.

Author: andrerav

ExpressionDebugger.Tests/DebugInfoInjectorTest.cs

@@ -798,7 +798,7 @@ public void TestRecordType()
             Assert.AreEqual(@"
 namespace ExpressionDebugger.Tests
 {
-    public partial record MockClass(string prop2)
+    public partial record MockClass(string Prop2)
     {
         public string Prop1 { get; set; }
         public string Prop3 { get; init; }

ExpressionTranslator/ExpressionTranslator.cs

@@ -2012,7 +2012,7 @@ private void WriteCtorParams(List<PropertyDefinitions> ctorParams)
                 var parameter = ctorParams[i];
                 if (i > 0)
                     Write(", ");
-                Write($"{TranslateNullable(parameter.Type, parameter.NullableContext ?? Definitions?.NullableContext, parameter.Nullable)} {char.ToLower(parameter.Name[0]) + parameter.Name.Substring(1)}");
+                Write($"{TranslateNullable(parameter.Type, parameter.NullableContext ?? Definitions?.NullableContext, parameter.Nullable)} {((Definitions?.IsRecordType ?? false) ? parameter.Name : char.ToLower(parameter.Name[0]) + parameter.Name.Substring(1))}");
             }
             Write(")");
         }