Minor, take String instead of Name in IrFunction.addValueParameter

All call sites of this method construct parameters with the given string
literal name (and more such call sites are coming in subsequent commits)
and it feels like a boilerplate to wrap it into Name each time manually

compiler/ir/backend.common/src/org/jetbrains/kotlin/ir/builders/declarations/declarationBuilders.kt

@@ -113,9 +113,9 @@ inline fun IrFunction.addValueParameter(b: IrValueParameterBuilder.() -> Unit):
         }
     }
 
-fun IrFunction.addValueParameter(name: Name, type: IrType, origin: IrDeclarationOrigin): IrValueParameter =
+fun IrFunction.addValueParameter(name: String, type: IrType, origin: IrDeclarationOrigin): IrValueParameter =
     addValueParameter {
-        this.name = name
+        this.name = Name.identifier(name)
         this.type = type
         this.origin = origin
-    }
+    }