chore(db-mongodb)!: remove deprecated useFacet property

[paulpopus]

Summary

• Removes useFacet from the connectOptions type — Payload no longer uses $facet aggregation anywhere so the option has no effect
• Cleans up the connect.ts workaround that was stripping useFacet: undefined before passing options to mongoose
• Updates the DocumentDB deployment docs to remove the now-invalid guidance to set connectOptions.useFacet: false

Breaking change

If you have useFacet set in your mongooseAdapter config, remove it:

mongooseAdapter({
  connectOptions: {
-   useFacet: false,
    // ...other options
  }
})

[github-actions]

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