GH-90645
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Validate extension JSON: API was removed: classes/XRPositionalTracker/methods/get_tracker_desc
Validate extension JSON: API was removed: classes/XRPositionalTracker/methods/get_tracker_name
Validate extension JSON: API was removed: classes/XRPositionalTracker/methods/get_tracker_type
Validate extension JSON: API was removed: classes/XRPositionalTracker/methods/set_tracker_desc
Validate extension JSON: API was removed: classes/XRPositionalTracker/methods/set_tracker_name
Validate extension JSON: API was removed: classes/XRPositionalTracker/methods/set_tracker_type
Validate extension JSON: API was removed: classes/XRPositionalTracker/properties/description
Validate extension JSON: API was removed: classes/XRPositionalTracker/properties/name
Validate extension JSON: API was removed: classes/XRPositionalTracker/properties/type
Validate extension JSON: Error: Field 'classes/WebXRInterface/methods/get_input_source_tracker/return_value': type changed value in new API, from "XRPositionalTracker" to "XRControllerTracker".
Validate extension JSON: Error: Field 'classes/XRServer/methods/add_tracker/arguments/0': type changed value in new API, from "XRPositionalTracker" to "XRTracker".
Validate extension JSON: Error: Field 'classes/XRServer/methods/get_tracker/return_value': type changed value in new API, from "XRPositionalTracker" to "XRTracker".
Validate extension JSON: Error: Field 'classes/XRServer/methods/remove_tracker/arguments/0': type changed value in new API, from "XRPositionalTracker" to "XRTracker".

All trackers now have an XRTracker base, and the XRServer uses the XRTracker type.