cg condition fix

[erhoo82]

What does this PR do ?

Avoid a invalid argument condition of cuda_graph_scope being None

Contribution process

flowchart LR
    A[Pre-checks] --> B[PR Tests]
    subgraph Code Review/Approval
        C1[Expert Review] --> C2[Final Review]
    end
    B --> C1
    C2 --> D[Merge]

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[ananthsub]

this is redundant with L141, which will check if None or if the list is empty