Do not force json

We are using scaffolding to create our database classes.
Sadly, the scaffold does not support json on the json field, instead opting for string.

This change will let the user use JSON functions more freely

Author: Tobbeman22

src/EFCore.MySql/Query/ExpressionTranslators/Internal/MySqlJsonDbFunctionsTranslator.cs

@@ -145,13 +145,7 @@ public virtual SqlExpression Translate(
 
             return result;
 
-            SqlExpression Json(SqlExpression e) => _sqlExpressionFactory.ApplyTypeMapping(EnsureJson(e), _sqlExpressionFactory.FindMapping(e.Type, "json"));
-
-            static SqlExpression EnsureJson(SqlExpression e)
-                => e.TypeMapping is MySqlJsonTypeMapping ||
-                   e is MySqlJsonTraversalExpression
-                    ? e
-                    : throw new InvalidOperationException("The JSON method requires a JSON parameter but none was found.");
+            SqlExpression Json(SqlExpression e) => _sqlExpressionFactory.ApplyTypeMapping(e, _sqlExpressionFactory.FindMapping(e.Type, "json"));
 
             static SqlExpression RemoveConvert(SqlExpression e)
             {