Improve package API log handling (#35100)

Simplify code and fix log processing logic

routers/api/packages/nuget/nuget.go

@@ -29,10 +29,9 @@ import (
 )
 
 func apiError(ctx *context.Context, status int, obj any) {
-	helper.LogAndProcessError(ctx, status, obj, func(message string) {
-		ctx.JSON(status, map[string]string{
-			"Message": message,
-		})
+	message := helper.ProcessErrorForUser(ctx, status, obj)
+	ctx.JSON(status, map[string]string{
+		"Message": message,
 	})
 }