Repro

{
  "rules": {
    "@typescript-eslint/interface-name-prefix": [2, 
      {
        "usePrefix": "always",
        "prefix": "CustomPrefix"
      }
    ]
  }
}

export interface CustomPrefixHelloWorld {

}

Expected Result
This rule would be awesome if it allow us natively to use the prefix we need instead of having only I. I know it's the recommended stuff, but sometimes a team works with same practices and other keyworks.

Actual Result
We can use only I 😞