fix(types): allow using an object to configure timestamps

[lantw44]

Summary

This is a documented feature. Users should be able to configure
createdAt and updatedAt separately when making a query from TypeScript.

Examples

Allow code like this to compile:

const result = await Token.findOneAndUpdate(
  { uid },
  { $set: { field: value }, $setOnInsert: { createdAt: new Date('2022-01-01T00:00:00.000Z') } },
  { session, upsert: true, new: true, timestamps: { createdAt: false, updatedAt: true } },
).exec();

[vkarpov15]

Benchmark results aren't great here, but I suspect that's due to #12037. WIll merge this 👍