### Godot version

4.2.dev 80de898d721f952dac0b102d48bb73d6b02ee1e8

### System information

OpenXR

### Issue description

The Godot 3 OpenXR plugin supported obtaining boundary/guardian information in order to obtain play space logic. While we do have a function in the `XRInterface` in Godot 4 that is supposed to retrieve this information (`get_play_area`) it is not implemented on the Godot 4 `OpenXRInterface`.

This logic needs to be ported.

### Steps to reproduce

Call `get_play_area`, be amazed by it not returning data :P

### Minimal reproduction project

Any XR project.
#include "openxr_api.h"
#include "extensions/openxr_extension_wrapper_extension.h"
#include "openxr_interface.h"
#include "openxr_util.h"
#include "core/config/engine.h"
#include "core/config/project_settings.h"
#include "core/os/memory.h"
#include "core/version.h"
#ifdef TOOLS_ENABLED
#include "editor/editor_settings.h"
#endif
#include "openxr_platform_inc.h"
#ifdef VULKAN_ENABLED
#include "extensions/openxr_vulkan_extension.h"
#endif
#if defined(GLES3_ENABLED) && !defined(MACOS_ENABLED)
#include "extensions/openxr_opengl_extension.h"
#endif
#include "extensions/openxr_composition_layer_depth_extension.h"
#include "extensions/openxr_fb_display_refresh_rate_extension.h"
#include "extensions/openxr_fb_foveation_extension.h"
#include "extensions/openxr_fb_passthrough_extension_wrapper.h"
#include "extensions/openxr_fb_update_swapchain_extension.h"
#ifdef ANDROID_ENABLED
#define OPENXR_LOADER_NAME "libopenxr_loader.so"
#endif
OpenXRAPI *OpenXRAPI::singleton = nullptr;
Vector<OpenXRExtensionWrapper *> OpenXRAPI::registered_extension_wrappers;
bool OpenXRAPI::openxr_is_enabled(bool p_check_run_in_editor) {