Use insert_debug_marker instead of debug_group

[IceSentry]

Objective

• wgpu 27 changed debug_group validation which breaks the camera debug_group

Solution

• Use insert_debug_marker until we find an alternative to using a debug_group

Testing

• I tested my change with the wgpu 27 branch

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Showcase

Unfortunately, this means we lose the nice groupings for each camera but we can still see each marker when a camera is being rendered