[BUG] MultipartFile doesn't show file input in Swagger

[thomaskoeppe]

Describe the bug

Swagger doesn't show a file input for MultipartFile

To Reproduce

1. Add new Post Controller
2. Add MultipartFile as param
3. Start server and open swagger doc

Expected behavior

Swagger should display a file upload input field

Code snippets

import { PathParams} from "@tsed/platform-params";
import { Post, Summary } from "@tsed/schema";
import { Controller } from "@tsed/di";
import { InventoryModel } from "../../models/model.inventory";
import { MultipartFile, PlatformMulterFile } from "@tsed/common";

@Controller("/inventory")
export class Inventory {
  constructor(private readonly calendarService: CalendarService) {}

  @Post("/:hostname")
  @Summary("Upload a file")
  async upload(@PathParams("hostname") hostname: string, @MultipartFile("file") file: PlatformMulterFile) {
    console.log(hostname, file);
  }
}

Repository URL example

No response

OS

Windows

Node version

Node v20.9.0

Library version

v7.74.1

Additional context

[github-actions]

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