SandBox: Add support for .exr files

[Popov72]

No description provided.

[bjsplat]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[bjsplat]

Snapshot stored with reference name:
refs/pull/16465/merge

Test environment:
https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/16465/merge/index.html

To test a playground add it to the URL, for example:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/16465/merge/index.html#WGZLGJ#4600

Links to test babylon tools with this snapshot:

https://playground.babylonjs.com/?snapshot=refs/pull/16465/merge
https://sandbox.babylonjs.com/?snapshot=refs/pull/16465/merge
https://gui.babylonjs.com/?snapshot=refs/pull/16465/merge
https://nme.babylonjs.com/?snapshot=refs/pull/16465/merge

To test the snapshot in the playground with a playground ID add it after the snapshot query string:

https://playground.babylonjs.com/?snapshot=refs/pull/16465/merge#BCU1XR#0

[bjsplat]

You have changed file(s) that made possible changes to the sandbox.
You can test the sandbox snapshot here:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/SANDBOX/refs/pull/16465/merge/

[bjsplat]

You have made possible changes to the playground.
You can test the snapshot here:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/PLAYGROUND/refs/pull/16465/merge/

The snapshot playground with the CDN snapshot (only when available):

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/PLAYGROUND/refs/pull/16465/merge/?snapshot=refs/pull/16465/merge

Note that neither Babylon scenes nor textures are uploaded to the snapshot directory, so some playgrounds won't work correctly.

[bjsplat]

Visualization tests for WebGPU

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/16465/merge/testResults/webgpuplaywright/index.html

[bjsplat]

WebGL2 visualization test reporter:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/16465/merge/testResults/webgl2playwright/index.html

[bjsplat]

WebGL2 visualization test reporter:

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/16465/merge/testResults/webgl2playwright/index.html

[bjsplat]

Visualization tests for WebGPU

https://snapshots-cvgtc2eugrd3cgfd.z01.azurefd.net/refs/pull/16465/merge/testResults/webgpuplaywright/index.html