[REQ] make Enum suffix configurable

Created by: scottdallamura

Is your feature request related to a problem? Please describe.

I'd like to configure the suffix used for generated enum values in C#. Today it generates enum values with an Enum suffix, which my team doesn't like :)

/// <summary>
        /// Gets or Sets State
        /// </summary>
        [TypeConverter(typeof(CustomEnumConverter<State>))]
        [JsonConverter(typeof(Newtonsoft.Json.Converters.StringEnumConverter))]
        public enum State
        {
            
            /// <summary>
            /// Enum ActiveEnum for Active
            /// </summary>
            [EnumMember(Value = "Active")]
            ActiveEnum = 1,
            
            /// <summary>
            /// Enum ClosedEnum for Closed
            /// </summary>
            [EnumMember(Value = "Closed")]
            ClosedEnum = 2
        }

Describe the solution you'd like

I'd like to expose a config option for the aspnetcore/CSharp generator that makes the suffix configurable (or clearable):

{
    "apiPackage": "MyApi.Controllers",
    "modelPackage": "MyApi.Models",
    "packageName": "MyApi",
    "sourceFolder": "",
    "enumSuffix": ""
}

Describe alternatives you've considered

This appears possible with a custom template, but it also seems to fit with other config options such as model-name-suffix.