VCST-3370: Set SqlServer.CompatibilityLevel=120 by default (#2918)

Author: artem-dudarev

src/VirtoCommerce.Platform.Web/appsettings.json

@@ -8,7 +8,7 @@
   "SqlServer": {
     // Set compatibility level to 120 (SQL Server 2014) to prevent the use of OPENJSON, which has poor performance.
     // https://github.com/dotnet/efcore/issues/32394
-    // "CompatibilityLevel": 120
+    "CompatibilityLevel": 120
   },
   "Serilog": {
     "Using": [