Fix 2384 handle cubemap in 2d sampler #2481
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Note: Diffbased against #2472 since there is some common infrastructure needed to track cubemap use.
Tests: https://github.com/abaire/nxdk_pgraph_tests/blob/bb915c94798906b325cc011383e1c2c270515d50/src/tests/texture_3d_as_2d_tests.cpp#L39
HW results: https://abaire.github.io/nxdk_pgraph_tests_golden_results/results/Texture_3D_as_2D/index.html
PR results:
Fixes #2384