Property enumPropertyNaming is missing in swagger v3 generator options

In Swagger v2 there is a typescript language option to configure the enum name handling: enumPropertyNaming,
This options does not exist anymore in the v3 version.

My enum name contains an _ in the name which i want also have in the typescript enum name. That why i configure the
enumPropertyNaming=original

In Swagger v3 this _ will now be removed:

Example api json:

"components": {
  "schemas": {
      "Example": {
        "type": "string",
        "enum": [
          "CONST_NAME"
        ]
      }
   }
}

Actual:

export type Example = "CONST_NAME"
export const Example = {
    CONSTNAME: 'CONST_NAME' as Example
}

Expected (with enumPropertyNaming=original):

export type Example = "CONST_NAME"
export const Example = {
    CONST_NAME: 'CONST_NAME' as Example
}

See commit from v2 which adds this option: https://github.com/swagger-api/swagger-codegen/commit/a4e5eb732ae2d582013bfb75e1043bab54a19f04

Inspect the v2 change in commit a4e5eb732ae2d582013bfb75e1043bab54a19f04, then compare how v3 handles TypeScript generator options and enum names. Add support for enumPropertyNaming=original so underscores are retained in generated enum properties, and verify the output matches the issue's expected example.