[kvankooten]

Repeated frame commits, including animation-time changes, can call Denoiser::setup() without changing the OptiX setup configuration. This currently repeats memory-resource queries and optixDenoiserSetup() for unchanged tiles.

Reuse the setup while tile dimensions and guide configuration remain compatible, and invalidate it on cleanup or denoiser recreation. Image descriptors and packing buffers are refreshed on every call so changed input/output addresses remain valid.

Adds TestDenoiserReuse covering repeated frame commits, guide modes, resizing, and disabling/re-enabling denoising. The test checks mapped output and verifies that equal configurations do not produce additional OptiX layer-creation messages.

Validation on Windows with CUDA 13.2, OptiX 7.7, and MDL enabled (MDL runtime DLL directory on PATH):

• Release build of TestDenoiserReuse and its VisRTX dependencies.
• ctest --test-dir _build -C Release -R '^TestDenoiserReuse$' --output-on-failure.

[tarcila]

LGTM, the only nit I have is relying on layers created output from OptiX for the test. Let's save that for later if this actually becomes an issue.