fix: handle the way to load apifactory nicely

[kobenguyent]

Motivation/Description of the PR

• Resolves ApiDataFactory with typescript factory file and ES6 export #3469
• With this fix, we could now use the following syntax:

export = new Factory()
   .attr('name', () => faker.name.findName())
   .attr('job', () => 'leader');

export default new Factory()
   .attr('name', () => faker.name.findName())
   .attr('job', () => 'leader');

modules.export = new Factory()
   .attr('name', () => faker.name.findName())
   .attr('job', () => 'leader');

@DavertMik may have concern on this, we encountered this once here #3691 (comment)

Type of change

• 🐛 Bug fix

Checklist:

• Tests have been added
• Documentation has been added (Run npm run docs)
• Lint checking (Run npm run lint)
• Local tests are passed (Run npm test)