OpenCage: Allow manually setting `no_annotations=1` for `forward_full` and `reverse_full`

For my use case, I need to reverse geocode a place and get the full response to get access to the [individual components of place name](https://docs.rs/geocoding/latest/geocoding/opencage/struct.Results.html#structfield.components). However, I don't need any annotations. It would reduce internet usage of my app if I could override the `no_annotations` flag.

I propose a field `no_annotations` to be added to the [`opencage::Parameters`](https://docs.rs/geocoding/latest/geocoding/opencage/struct.Parameters.html) struct. Setting it to `true` would pass `no_annotations=1` to the API.