Replace EnumToNumberConverter with EnumToStringConverter for all enum types in ConfigureConventions

## Ask a question

Is there a way to globally change the enum converter with the new `ConfigureConventions` method ?

### Include your code

Is there a way to do something like that ?

```C#
protected override void ConfigureConventions(ModelConfigurationBuilder configurationBuilder)
{
configurationBuilder.Properties()
.AreUnicode(false)
.HaveMaxLength(32)
.HaveConversion();
}
```

EF Core version: 6.0