[Test] Exclude fractional GPU instance types from all tests - #7552
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Fractional-GPU instances require the NVIDIA GRID/vGPU driver. ParallelCluster installs the data-center driver instead, so it cannot bind to the vGPU and cluster creation fails.
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Description of changes
Exclude fractional GPU instance types from all tests as pcluster does not support instance types with fractional GPUs.
Instance tpyes with fractional GPUs (e.g. g6f) are recognizable by having GPU manufacturer = Nvidia and Gpu.count = 0.
Fractional-GPU instances require the NVIDIA GRID/vGPU driver. ParallelCluster installs the data-center driver instead, so it cannot bind to the vGPU and cluster creation fails.
Tests
Logs proving that fractional GPUs are excluded from the list of types used by tests.
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