fix(gdn): allow importing gdn_decode without a CUDA device #4538

Job	Run time
Permission Check	2s
Setup	3s
JIT Unittest (H100)	1s
JIT Unittest ${{ matrix.shard }} (A10G)	1s
JIT Unittest (T4)	1s
Analyze GPU T4 Failure	1s
Analyze AOT Failure	1s
AOT Build Import (${{ matrix.arch }}, ${{ matrix.cuda }})	1s
JIT Rerun (T4)	1s
Analyze GPU A10G Failure	1s
Test Results Summary	1s
JIT Rerun ${{ matrix.shard }} (A10G)	1s
AOT Build Import Rerun (${{ matrix.arch }}, ${{ matrix.cuda }})	1s
	16s

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