[Bug] Incorrect size of environment depth texture returned by TryAcquireEnvironmentDepthCpuImage in AROcclusionManager

[marcinwalus]

TryAcquireEnvironmentDepthCpuImage in AROcclusionManager returns image with incorrect size.
Having EnvironmentDepthMode in AROcclusionManager set to Best environmentDepthTexture property returns texture with size 2048x1536. Using TryAcquireEnvironmentDepthCpuImage on same occlusion manager returns XRCpuImage of size 256x192

To Reproduce
Steps to reproduce the behavior:

1. Open "Assets/Scenes/Occlusion/DepthImages.unity" scene from "ARFoundation samples"
2. Change EnvironmentDepthMode property to Best in AROcclusionManager attached to "Main Camera" game object
3. In DisplayDepthImage.cs create code to acquire depth image
4. Run application on device and attach debugger.

Expected behavior
m_OcclusionManager.TryAcquireEnvironmentDepthCpuImage should return image with dimensions: 2048x1536

Actual behavior
m_OcclusionManager.TryAcquireEnvironmentDepthCpuImage returns image with dimensions: 256x192

Smartphone (please complete the following information):

• iPhone 13 Pro Max
• OS: 17.0.2
• Unity version: 2022.3.10
• ARFoundation version: 5.1.0-pre.10

[marcinwalus]

@andyb-unity IN-63824