Refactor IDeleteFeaturesOptions

[gavinr]

Describe the problem

The IDeleteFeaturesOptions type does not properly cover all ways of using the deleteFeatures REST endpoint.

Describe the proposed solution

Add to the type functionality like:

• you can delete via a where or objectIds or geometry (or others too perhaps?)
• If you pass a geometry you also need to pass a geometry geometryType
• etc

See discussion in #925