text: Title: Lost all the default import and export options after upgrading to V4
  Body: We have lost all the default file import export options in new version:
  Below is what was working previously:
  ![image](https://github.com/django-import-export/django-import-export/assets/71445383/4701c424-a582-4811-b82e-dfdd0ccda300)
  
  Below is the steps to reproduce:
  
  **requirements.txt**
  ```
  django-import-export==4.0.1
  django==5.0.6
  openpyxl==3.1.2
  ```
  
  **models.py**
  ```
  from django.db import models
  
  class Division(models.Model):
      id = models.AutoField(primary_key=True)
      name = models.CharField(max_length=100)
      description = models.TextField()
      created_at = models.DateTimeField(auto_now_add=True)
      updated_at = models.DateTimeField(auto_now=True)
  
      def __str__(self):
          return self.name
  
      class Meta:
          verbose_name_plural = "Divisions"
  
  
  class Site(models.Model):
      division = models.ForeignKey(Division, on_delete=models.CASCADE)
      code = models.CharField(max_length=10, primary_key=True)
      name = models.CharField(max_length=100)
      description = models.TextField()
      created_at = models.DateTimeField(auto_now_add=True)
      updated_at = models.DateTimeField(auto_now=True)
  
      def __str__(self):
          return self.name
  
      class Meta:
          verbose_name_plural = "Sites"
  ```
  **admin.py**
  ```
  from django.contrib import admin
  from import_export import resources
  from import_export.admin import ImportExportMixin
  
  from .models import Division, Site
  
  
  class DivisionResource(resources.ModelResource):
      class Meta:
          model = Division
          fields = ("id", "name", "description", "created_at", "updated_at")
  
  
  @admin.register(Division)
  class DivisionAdmin(ImportExportMixin, admin.ModelAdmin):
      resource_class = DivisionResource
      list_display = ("id", "name", "description", "created_at", "updated_at")
      search_fields = ("name", "description")
  
  
  class SiteResource(resources.ModelResource):
      class Meta:
          model = Site
          fields = ("division", "code", "name", "description", "created_at", "updated_at")
          import_id_fields = ("code",)
  
  
  @admin.register(Site)
  class SiteAdmin(ImportExportMixin, admin.ModelAdmin):
      resource_class = SiteResource
      list_display = (
          "division",
          "code",
          "name",
          "description",
          "created_at",
          "updated_at",
      )
      search_fields = ("code", "name", "description")
  ```
  Now all the options we have is csv, tsv and json. No settings changed.
  ![image](https://github.com/django-import-export/django-import-export/assets/71445383/42231ab2-e155-4d79-adec-6c686567543a)
  